My wife and I use the wired Tandem-com and really like it. I don't need it so much to hear her as she is right behind me, but it makes it much easier for her to hear me.
Here are a couple of positive thoughts:
1. As was a previous poster, I was intially concerned about the com blocking out road/traffic noise. The headset only has one earpiece (although it is on the left/traffic side) and it doesn't fit in the ear so you can hear sounds "past" it. I can still hear traffic coming up from behind. We don't use the music input option so all I have in my ear is the breathing/conversation of my beautiful bride!
2. The headset is no less comfortable than a pair of glasses. I wear both while riding and don't have any discomfort.
To be fair, here are my nit-picks:
3. The headset jacks on the com unit are _just_far enough apart to plug in the headsets. The plugs are touching each other when plugged in and they appear to be exerting pressure on the chassis of the com. It hasn't been a problem, but the tolerance is really tight.
4. The only "discomfort" I've had with the com was when my stoker saw a bald eagle on a ride and shouted to me "Do you see that bald eagle?"
All in all, I'm very happy with the com and we use it every time we go out.
Hope this helps and best regards!