I bought the intercom about 2.5 years ago. I had tried hands-free headphones, as well as some other intercoms before getting this one. The headphones are not convenient for putting on and taking off the helmet. The other intercom, which cost around €70, had terrible sound, muddy and distorted. So I decided to spend a bit more money to get something better (you get what you pay for).
The Interphone Sport has very good, clear, and quite loud sound (I didn't expect to hear bass from such a system). Others can hear me clearly when I speak, and its controls are good, with plenty of buttons for various functions.
The battery is one of its biggest assets. With usage of 3-3:30 hours daily (radio and talking), it lasts around 6-7 days. At first, it lasted 1-2 days longer. If it's just on standby, it lasts much longer.
The app works satisfactorily.
On the downside, sometimes, especially when the battery is low, the volume of the system's speech automatically becomes very loud, deafening.
The rubber that seals the charging port (micro USB) broke after a while, without me forcing it. Patent No. 1.
The automatic volume works well, only without a windscreen. If there is a windscreen, it doesn't work properly, randomly increasing or decreasing the volume.
Sometimes, I haven't pinpointed the specific reason, the volume buttons and the next/previous station or music track buttons do not respond. I then have to close and reopen the music or radio, and they may come back, or even better, I have to restart the intercom.
I initially installed it myself, and for about a year it worked without issues. Gradually, one channel started cutting out until, after a few months, it completely stopped working (the same channel). At one point, I went to the store where I bought it and mentioned the problem. They told me it was the cable coming from the device. Indeed, when I moved the cable, as long as I held it, the other channel worked, so I asked them to replace it. An employee of the store installed it, and everything was fine at first. After 3-4 days, the foam around the microphone came off by itself, resulting in others not being able to hear me when I was in motion due to the noise it picked up from the wind. (They told me at the store where I bought it that the foam comes off due to the heat and humidity of breath). So, I made Patent No. 2, and there were no problems.
After about a month, the interruptions started again, and after two months, one channel completely stopped working. The cable is quite exposed, but it’s not worth it to keep paying €38 every so often. I went back to the store, and they changed the position of the unit, raising it a bit higher, and for now, it’s going well. It cuts out again, but with a little movement of the cable, both channels work. After about 2 months, one channel completely stopped again...
I bought the intercom for around €180; today I see it for €200. With such a price, one expects better durability over time.
As you can understand, I would not recommend it.

Expensive set but quite good overall. Good battery that lasts up to weeks with heavy use. It also has a good radio. A few points to pay attention to:

- It's good to have a "quiet" helmet. In ls2 vector it's okay (which I consider average in noise), in a worse helmet it may not be suitable for conversation (i.e., only for music)
- As far as I researched, if you want to talk with 2 of these, you can either talk or listen to music. Not both at the same time. It would be nice if it could mix on trips.
- The cable that goes to the speakers is quite sensitive but also cheap to replace.
- Nice waterproof construction inside, it uses a branded li-ion battery BAK (built-in). Which means that the unit will probably last quite a bit.

Much better than the unacceptable linkin ride pal I had.

I really wanted to buy it because of the price, even though a friend of mine had it and had told me impressions, really it's not worth getting something else

I have it for 3 months and I can say that it satisfies me completely, very good battery life, installation on nolan n87, strong and good sound depending of course on the quality of the audio track, the radio is excellent, it catches almost everything in the province where I move, the Greek speech needs some small improvements but overall it's fine. It remains to withstand the test of time.

The best purchase I have made for my motorcycle! I have been using it for 6 months and I am completely satisfied. The connection with my mobile phone (iPhone) is immediate and flawless. Those who hear me can't believe that I am riding a motorcycle. The intercom function is very satisfactory even at long distances. If the connection is lost due to distance, it automatically reconnects as soon as it is within range again! The radio and music (Spotify) are also excellent! The sound is loud even with earplugs (for touring motorcycles). On a sport motorcycle, the sound is clearly reduced due to the motorcycle's noise. The battery lasts forever, with daily use it lasts a month or more. It has become an essential equipment for me. For me, it is worth the money and more.

Quite good, the battery lasts for months!!!
It does not have noise cancellation and its controls are quite large, I have tried it on both full-face and jet helmets.
You can hear the wind from the passenger through the intercom.
It connects very easily to the mobile phone and to other intercoms, the radio is good and picks up stations very well, with 6 presets and very easy handling.
Make sure to update before installing them on the helmet

After three months of use, I can say that I am very happy with this intercom system.
Specifically:
It is waterproof. After winter rainstorms, I had no issues.
The battery life is incredible. After the latest upgrade, it lasts for 20 hours. For me, who uses it daily for about 1.5 hours for radio, Bluetooth with my phone, music, and calls, it practically means charging every 2 weeks without immediate charging notification.
The sound quality is amazing. With my racing premier dragon helmet and noise from earplugs and speeds slightly above the legal limit of 150km/h, I can listen to music just fine. And if I reduce the speed to around 100km/h, I can talk on the phone without the other person knowing I am on a motorcycle.
With communication with another rider on a different bike, we had good conversations for hours at distances of around 500 to 800 meters, with a small issue when the communication was restored after losing connection due to distance. It can be fixed by restarting.
The radio has very good reception. I dare to say it's like a car radio, and I use it every day within the city, but it has also been tested with excellent results on mountain routes.
Overall, I highly recommend it, even at the high price in Greece.

UPDATE 2-1-2020
After two years of daily use, I have no issues. It performs just like the first day, whether in winter or summer, inside or outside the city. Simply flawless. It is now installed on a SHOEI RYD helmet.

UPDATE 17-1-2023
With intensive use, the battery may be a bit tiring. It lasts for 10 to 12 days. Other than that, it's like the first day. The only thing that changed is the wiring because it broke at the mini USB port.
Simply perfect.