I have a 10U ready to install in my C3Pro....when I get it (a week or two). I will post up my comments then. I have been using Scala G4 and G9's for years on both motorcycles and snowmobiles and wanted to try something different!
I just installed a 10u in my Shoei GT Air. I like it so far. Installation was pretty easy, the hard part is remembering what button does what. I think yours comes with the 20s speakers so the sound quality will be better.
So far I like it too. Had a hard time installing the back part between the liner and the shell. But eventually got everything installed. Really like the integrated look of it. And I like the FM radio. It seems to work pretty good although I get static popping when I change preset channels and the voice comes on The gizmo that goes on the handgrip is going to take some getting used to. I can't remember what the buttons are for either.
I updated the firmware to v1.2 and like how it can do 2 AD2P connections. Like the android phone app for it too.