Yes, I installed Scala Rider Q3 to my Shoei Multitech. This was not so easy but after few moments it went well. Now I can make intercom calls between my pals even 1 km away. Also using phone and listen to Spotify and satnav is easy while driving. I have compatible Schuberth SRC-intercom system at my open Schubert M1 helmet too!
I have the Scala Shoei Sho-1 intercom system in my NXR helmet. It's decent but recently stopped working. It was out of warranty but Shoei took it back and fixed it free of charge! I only use it for music but it sounds good. Not sure I'd buy it full price but got it as part of a deal with the helmet.