http://www.jeeppatriot.com/forum/showthread.php?t=428
Yes, I have it. I think it sounds really good, and I recommend it.
I got it mostly for the included subwoofer and convenience--(get it in the payments, already installed, 3/36 warranty,etc). Having the speakers in the tailgate fold down isn't real important to me, but going from 4 to 9 speakers (with 458 watts) just sounds like a good idea. The two dash speakers and the two tailgate speakers add to the surround sound ambiance envelope, instead of just the 4 speakers in each door. They are Boston Accoustic branded, so they are supposed to be of somewhat higher quality than normal stock factory speakers.
I agree that probably a $495 aftermarket speaker set may be better, but would require either self install (my time) or shop install (paying someone else to do it would probably quickly exceed the $495 total including speaker purchase+subw+crossovers+amps, etc). Also, an aftermarket subw install wouldn't come in the convenient factory enclosure panel.
I haven't heard the 4 speaker system, but other posters have talked about how good just the 4 speaker sounds and in their opinion it is good enough.
For me, if the motor is running the speakers are playing, and I want clarity and good sound. Therefore, this is probably the most heavily used option available--used much more than A/C, 4x4, cruise control, heated seats, etc.
More technical info on user mods:
http://www.jeepforum.com/forum/showthread.php?t=376809