Let's be honest, it's not like the network cable... But... When you want to avoid drilling, nailing, channels, and stories, it literally frees your hands...

In a single-phase supply...

I put one in the living room at the router and the other in the inner bedroom, with another bedroom, kitchen, toilet, and hallway in between...

This distance entails a different switch/fuse phase in the panel... I think these switches only cut the phase... Neutral and ground must be common...
Also, if I'm not mistaken, the powerline with a plug specifically must be MIMO in transmission, which means they use all 3 power wires to transmit the signal... That is, including the ground... Instead of the previous SISO technology that only used phase/neutral...
For example, bipolar ones that don't have grounding might be SISO, hence their usually lower communication speeds...

Out of the 100 that I have given it as a line, it brought me 50-70 without instability or interruptions so far... I also added an access point on top and it's fine with the wireless part... Because I was mainly interested in the wireless inside the room...
Not so much the connection to a computer with a cable... That comes second... Although if I need it, I can throw a cable from the switch of the access point and it's fine...

The wiring and the socket you put it in play a very important role... The rule is strictly and only directly into the socket and then you can plug in whatever else you want after the powerline... It didn't connect at all in a power strip, in others it happened to work in a power strip, but not for me... And with a surge protector single socket before the powerline, it cut my speed in half, so I put the surge protector after the powerline for the protection of other devices... It won't protect the powerline, but what can we do since that's how technology is... I hope the powerline has some corresponding protection inside...

Of course, the well-known plastic T plug can also be used for connection to the socket if needed as it doesn't seem to affect much since it communicates directly with the wires in the wall... If it can be avoided, that's better...

Generally, although it had a bit of a run at the beginning until everything was set up, everything is going well.... That's it... What else... Maybe that they get slightly warm... But generally, I would say it's okay....

-Update after a few days... They didn't disconnect, nor did they bother my internet browsing in any way... But they started giving me somewhat lower speeds than I measured at the beginning when I set them up... Almost half....
The issue was somewhat resolved with plug/unplug and re-pairing... Also, it seemed to me that it takes a while to make the pair... The light was showing red/green indicating it was trying to connect until it stabilized green... Maybe the distance or the hours that various devices operate with whatever that entails on the power network (noise) if you understand me...
It hasn't bothered me since then...
Not so much that I would do the same process again...

I should also mention that I noticed that at intervals it seems to raise the latency somewhat... It's not as low as when you connect directly to the main router... Maybe it does some error correction, and that's why it raises the ping, I don't know...
This also hasn't bothered me since then and the ping has dropped or rises a bit at intervals on the powerline network... But it doesn't seem to disturb...

Also, in a quick power outage, it seems to have frozen and didn't work, the lights were blinking... I didn't let it see if it would recover on its own... I'll do that next time...
Anyway, it came back just by plugging and unplugging one device.

And I'll say it again... It's not like the network cable... Only a temporary emergency solution if someone is too lazy or can't easily run a cable... That's it...

In general, as I said, it's okay... Not something great like the cable, but okay, it did the job somewhat...
From 10 I was getting with a repeater/extender in the bedroom, I went to 50-70 depending on the time... For now, I'll manage like this and then we'll see...
If I ever decide to run a cable and look for newer equipment and access points with 5GHz band (instead of 2.4 now) that will require higher speeds...

Once when I was using the network through the powerline, it interrupted the signal of the TV that is connected to the same socket...

And I've also noticed that if you don't use them for a while, it's like they go into save mode and give mediocre speeds, and with use, they wake up and increase speed...

That's it... The little things... :)
In general, I don't have any issues... I declare myself relatively satisfied...
If they had some app to see the speed, for example, that they communicate with each other, that would be nice... But it's okay....

Update..
Although I never had stable speeds...
I had given it a 100Mbps port in the living room where the router is, and inside the second bedroom quite a distance of about 20-30 meters in a straight line, so very roughly measured in my mind, it brought me 30-80 when it was in the mood, and I had declared myself satisfied with such distance and what it achieves... I mean having a wired network everywhere...
After 1.5 years, it has come to give me 40 when it’s in the mood and 25-30 normally... And in both directions up/down... I have made some changes to the sockets like adding smart plugs & ups always after the PLCs so they wouldn't affect them.... But even without those devices on the line, it doesn't improve again like before....
I paired again after unplugging, but the same...
Disappointment, but what can we do....
At least the connection never drops...
And the ping is just fine....
That's it.... If the speed drops lower now, I'll see what I'll do with them.... I mean a more thorough investigation...
Until then, for higher speed, I will put a 5G extender somewhere in the hallway....
And in general, I will have 100 networks as the situation has turned out...

I might get a bit annoying, but guys, really, if you can run a cable, please do it...
These devices are really just an emergency solution as it seems....

After two years, the speed that was once 50-80 has dropped to 15-30..
I changed them and put them in another socket, but the distance from the living room to the bedroom affects them quite a bit it seems.... Or maybe they have some internal wear due to usage...
Stable ping might be a little, it does give you a network port at the point you want, but let's face it, there are losses..
And I haven't changed anything in the house's electrical system...
All my devices are after the PLCs...
Unfortunately, they are easily affected...
I would try the more branded Devolo ones that have another communication protocol, g.hn I think, but I think about the money they cost and any potential losses again... These are usually recommended for three-phase... I have single-phase, so they might work a bit better.... But they cost a lot... And again, their nature? They can't escape it... Logically, there will still be losses...
Now I had gotten dlink again with the same AV2 model, there were also tplink...
But the salvation is one.... The one I was saying from the beginning.... Cable!!!
If I ever don't get bored, maybe I'll pass it.... What can I say...
As if I'm going to get into the trap of giving three hundred to try plc...
I gave 50€ and whatever happened, happened...
After that, it will be cable hammer and nails.....
We won't go broke for a questionable result...

Finally! These devices are ONLY EXCLUSIVELY for emergency solutions...
Otherwise, c.a.l.l.e. cable....

I have the Kit for a year and something.
The first few months it was perfect, in the first year (maybe even less) disconnections started, and the speed went from 90 +- to 100 line, one moment it reached 20, the next 30, and at one point it even reached 2. I searched a lot on the company's website (and generally on the internet) to find a solution, but they haven't released any upgrades, so the next move was to talk to the store where I made the purchase. I explained to them exactly what was happening, and they told me that they need 8 to 10 business days to check it.
The same company told me again that it could take 20 to 24 business days because if there is indeed a problem, they will have to bring it from abroad.
However, when I bought it, I paid the almost 65 € directly and I couldn't have been delayed even for a minute, but these specific companies want several business days for a simple check.
That I will have to go and get another powerline or wifi extender to have internet on my PC all these days doesn't say anything.
Anyway.
I would say to future customers of this specific company to think again before making a purchase because the same company has left its products at the mercy of God.