It offers no security at all, in a new house, within Attica, out of the 4 Mitsubishi Heavy air conditioners (3x12 and 1x18 btu) 3 of them burned their circuit boards (the two 12s and the 18!) and these didn't "notice" anything! So I would say it's more of a placebo effect rather than something worthwhile, unlike the Well Voltage Protector https://www.skroutz.gr/s/21246257/Well-Voltage-Protector-Monoprizo-Asfaleias-20230-005.html which really does an excellent job.

Satisfied after about 2 years of operation. It has a green light on the front that shows if it still provides protection against network overload

Very good, we used to have constant shutdowns on the TV and fridge during thunderstorms but after installing the APC it hasn't happened again.
Update 04Feb26
I have connected directly to the APC and to a power strip that gets power from the APC cable and I provide internet to another room, with a second APC in a very old house. On the second APC, I have connected a camera and everything works very well.

For the gentleman with the MITSUBISHI @EL GRECO-101, sometimes the boards burn out due to an internal problem of the aircon. Do a Google search for the model you have. Also, whether the Mitsu is made in Thailand or Turkey, it makes a difference.

stable value but unfortunately they are not available, because production has probably stopped... I have about 8 pieces all in fragile packaging and all are fine

Perfect, it does exactly the job for which I got it. In fact, at one point, some voltage spike or other network malfunction (which also tripped the main breaker) caused one to go out, but it saved the TV that was on it! Of course, I have bought plenty and have them in every outlet of my house, it is the best possible protection for my devices, I have had them for years and they have never disappointed me. I highly recommend them.

EDIT: Unfortunately, their production has stopped: https://www.reddit.com/r/hardware/comments/1bin4xu/apc_getting_out_of_the_surge_protector_business/

I plugged one into the refrigerator and one into the air conditioner. APC covered me with free shipping of a new one from Northern Europe, via FedEx, within 3 business days after a power strip of theirs burned out on me in the past, so I decided to trust them again.

So far, it's amazing, and I hope I won't need to come back to edit my review.

The product is no longer available from APC, which is why its price has skyrocketed. It is a very good device and does what it promises at a low cost. People should read a bit and understand that such a device only protects against surges that pass through the power outlet and not from anywhere else, such as a TV antenna, telephone line, or network cables. All the comments I have read that say devices were ultimately damaged despite having this protection at the power outlet are all televisions, routers, sound systems, meaning they were all connected to each other and received the surge from the antenna or from the telephone line through the router and subsequently through the network cable.

A lightning strike happened today, the TV burned out, but this still turns on, as if it’s working normally... I don’t know if it’s worth it and I had it in high regard

I haven't needed it yet, but I hope it will save my device!
Very good build quality for its price.

Quite good for starting electric motors such as refrigerators, air conditioners after a power outage that start automatically if they are already running and can burn out boards from overvoltage. Look guys, it does not protect from undervoltage, it is not a voltage stabilizer with toroidal etc. Quality construction I got but cheaper ones burned out because they were poor quality. This is one of the decent ones, it has both better and more expensive options. You shop from the medium to lower basket from here to know what you are going to buy

No protection!!!!!!!!! Supposed to protect from lightning
I bought 7 sockets, one for each device! Lightning struck and 3 TVs burned (one worth about 2,000 euros), the router, and a 4K sound amplifier.
Only the computers were saved because their power was cut off from the power supply!
The sockets, as seen in the photo after this damage, are intact when they should have burned to protect the devices after such a high load!
A lawsuit for product failure is normally required.

I have another one from the same company..I bought one for the refrigerator too..I think it does its job! We can't know for sure..!

I bought one for the refrigerator and one for the washing machine. At first glance, it looks very high-quality.

In the past, I had a major power surge in my house which resulted in everything dying except for the items that were plugged into this outlet. It saved my television, washing machine, air conditioner, and refrigerator. Currently, any outlet in my house that has something permanently plugged into it also has an APC.

I bought a total of three. 2 for the air conditioners (toyotomi) and 1 for the refrigerator (samsung).
I had 2 unknown origin ones for the air conditioners and because I have experience with APC (power strips and UPS), I now have APC almost everywhere in the house and I feel calm.

I have it on the wall with a 4-outlet power strip that has a 12,000 BTU air conditioner, an internal wireless doorbell unit, the router, and a security camera. No problems for 3 years now. Today, when I turned on the air conditioner for cold at 20 degrees, I heard a "click" after a while and everything mentioned above shut down. I thought the air conditioner burned out! Fortunately, it was just our friend that got burned! From what I understood, the power strip was very old and worn out without me realizing it. Thankfully, it did its job PERFECTLY and saved my devices! I will definitely buy it again!

I placed it on my new air conditioner, I have two others and on other air conditioners after a circuit board burned on a midea I have. Nothing has happened since then, but from the reviews, it seems good and will show over time.

The construction seems quite high-quality. Now, as for whether it does its job well, I will be sure when it hasn't done its job well. So far, as long as it's connected, it continues to work, but I don't constantly turn the main switch on and off on the panel, only to test it.

I have installed 16 pieces in my house. Many power outages, mainly in the summer. 5 of them burned and the following devices: inverter air conditioner, cordless phone, television (speakers), computer, conventional air conditioner. They did not all burn at the same time but at different times. I don't know if it still saves you even if you put some protection on the panel because experts there give a failure rate of 8-10%.

I used it in a generator to vaporize oxalic acid in my beehives. I placed it to prevent any sudden increase in gas from damaging the device. After 1 hour of use, I can say that it worked fine. If anything changes in the next times, I will update.

It is a bit bulky, but it is very well made! And once it saves your device, it's worth every penny!

I have put it in a very problematic socket which occasionally increased the voltage significantly, it had also caused minor damage to an electronic device, now everything seems fine.

So far, in 2 cases it has not delivered what it promises and two devices have burned out

Very good product. Besides protecting against power surges, it filters some frequencies beyond the basic 50Hz, resulting in smoother operation of multiple devices. As a side effect of this, it should not be used before Powerlines. For more serious voltage fluctuations protection, I recommend AVR.

More or less, the previous reviewers have said it all... very high-quality construction and a true rock... highly recommended without hesitation

I have used it on all expensive electrical appliances (refrigerator, washing machine, etc.). Once it starts working, it pays for itself.

One of the best protections on the market. With so many power outages, it has never burned anything for me, and I use them in bulk for devices.

I have been using them for years in an area with frequent power outages. It is truly a very good product. Value for money.

You may never need it, but for valuable devices such as air conditioners, washing machines, refrigerators, etc., you will need it once and it will do its job.

I write about the black one that in terms of reliability I cannot rate it because I have only had it for a few weeks, but its quality shows to be excellent in the plastic parts.