Personally I think the J&M is a great peice of equipment. I use it, my buddies use it and it works great with no problems noted as of yet.
Sorry, I didn't mean to sound antagonistic. It is just that I have been testing various intercoms for about 9 years now and I can tell you that there is a huge difference between the sound quality of units like the Autcom and Baehr, and the J&M stuff. Autocom has the best noise cancellation in the industry and is used by Formula One drivers. Their units use active electronic filters to remove wind and road noise from the system, and the result is that you can use their units at much higher speeds. I have used an Autocom while talking bike to bike with both bikes traveling at 145mph (on a closed track) and the voice quality was crystal clear, like talking on the telephone.
Baehr also use good active filtration on their systems, though they are a bit more pricey.
I have also used lower grade intercoms that become totally unusable at any speed over about 70mph because they only employ what they call "noise cancelling mics" and don't have any active noise filtration in the intercom amps. Noise cancelling mics are not really very effective, and while they may help a little, a good intercom will not rely on them for noise reduction. Proper noise reduction can only be done with sophisticated frequency filtration on the amps themselves.
Of all the different systems I have used, I feel that Autocom offers not only the best bang for the buck, but also has the very best noise filters in the business. If you are happy with your J&M, I suggest you never try an Autocom, because once you do, you won't like your J&M anymore.
As for CB versus FRS, I really don't care for CB due to all the chatter and junk on the airwaves, and the AM modulation causes lots of noise, plus you always have to fiddle with a squelch and get poor range. I can use a $50 FRS UHF radio that gets zero noise and static, has no squelch to mess with, and runs on 3 AA batteries for a week and takes up about the same size as a pack of ciggarrettes, and I get better range out of it. For bike-to-bike communication, it really is a better option. I guess if you want to listen to truckers then you are stuck with CB, but personally, I don't care to hear all their useless chatter. You also can now get FRS radios that have built in Weather Radios so it can do double duty.