I have had it for almost two years. The only positive thing I can say is that it simply allows you to talk on the phone and listen to music discreetly, with a good battery life, etc.

The negatives are many...

Until you connect to your group, it loses connection frequently. If you receive a phone call and disconnect from the group, it's difficult to reconnect. The quality of the headphones and wiring is very poor. I have changed my headphone and microphone set four times due to regular use because their contacts keep breaking, and the microphone easily breaks due to the flip-up helmet in front where you speak. The cost of the headphone and microphone set is 30€. Overall, I have paid 290€ for this intercom system... (I bought a double set with a friend and paid 170€ for one). It would have been better to directly buy Sena.