You can find the headset at places like Revzilla.
The attachment to the helmet wasn't too hard to make - it just clamps. My helmet lining wasn't as easy to work with as some of the newer helmets out there but it seems solid enough. I will say that the location I have the speakers isn't perfect and squeezes on the ears a bit. I might be able to adjust it a bit better or a different helmet may have a little bit more room in the ear area.
I tend to try to avoid talking while commuting (traffic is very heavy) so I have only made/taken calls a dozen or so times. The voice quality and volume is pretty good. The difficult part is that I still feel the need to adjust the volume when stopped versus travelling 35-55mph. I usually end up being too loud when stopped.
The controls are basically a rotating dial (that depresses in the center too) and a couple buttons. They are pretty easy to operate but the buttons I tend to have to hunt for a little bit. It might be a bit challenging with thicker winter gloves for the smaller buttons but thin gloves still allow enough feeling to operate.
I don't use it enough (and haven't reread the documentation recently) to remember how to access most of the features while riding - just answering the phone taxes my memory some days.
To program the speed dials or change other settings you can either use a smart phone app or a PC based application. I've done both and it was pretty straight forward. I do wish I had 4 speed dials instead of just 3 but that isn't a deal breaker.
I did use this with my phone (Android based) once or twice for navigation purposes and it worked well. I bought a handle bar mount phone holder to allow easy use for this - this is pretty much a requirement. I'm also tempted to get a double USB charger and cables that I can use from the bike in case I get lax on keeping things charged on a day I really need it. Would I ever get lax on charging? Um, yeah.. (sheepish look)..
Overall this was a good purchase. If we end up doing a bunch of dirt biking it might be worth getting more so we can communicate easily.
This is a view of the overall external attachment. The mic is easily adjustable back into the correct position once you get the helmet on.
This shows where I detached the portion that contains the battery. I tend to detach it to charge but I could charge it while on the helmet if I have a convenient wall socket and place to sit the helmet.
The round blob on the lower part of the pic in the cheek area is one of the speakers. The kit comes with some Velcro type attachments which hold pretty well.
This pick shows the other speaker at the top of the strap.
Thanks for reading and I pray for safe travels for all the other riders out there.
Scott