Running three
Sena 10R's here. Like the SMH10, but next generation.
Slimmer (see pics), larger speakers, Bluetooth 4.1, better battery life, etc...
I really like them. I actually answered my first phone call the other day (I had a pool table for sale on Craigslist, and I knew the buyer was calling), he coudn't even tell I was on my bike.
Intercom functions well between the three of us (Me, Son, Daughter).
Range is acceptable... not the 1/2 mile or more that it claims, but the range is much further than I would ever get away from my daughter anyway (she's a newbie).
Installation in my Nolan N104 EVO was simple, and the external battery fit in the existing pocket within the back of the helmet.
With the battery being external to the controller, it has very long life, and if it ever begins to not accept charging, you can replace it without buying a new device.
I made one small slit on the neck-roll trim for the cable to pass inside the helmet (see pics), and stuck it on the outside over the hole that Nolan provided for their proprietary communicator.
Looks like a factory install in my opinion. Couldn't have asked for an easier fit.
My Son's helmet was not as accommodating, so his battery went on the outside back, and my Daughter took the time to cut a notch behind her neck-roll and hid hers like mine.
I used the goose-neck boom microphone (it includes both types) and I just tuck it up out of the way when not using it (see pics).
It is truly
the most comfortable and functional helmet I have ever owned. Adding the Sena 10R just made it better.
Just my $.02.
Jim