The J&M is a great piece of electronics. I bought mine unit in 2004. I had a small problem with headset cable, and they replaced the cord with no questions or hassle.
As a suggestion look at Sierra Electronics for the set. They gave me fantastic support and saved me a fair chunk on money on the J&M. One hint is to get the longest (4 foot?) antenna. I had to pull over once and the group was out of range in no time. I have the 3 foot antena which is still good 99% of the time.
Also with J&M you can plug all sorts of stuff into it, MP3 player, Sat Radio, GPS voice, etc. Super if your a gadget freak.