Yeah, I use my roadtrip sometimes and the iTrip both work. It will scare you at first because it says this device may not be compatible. If you put it in airplane mode, no static and crap. The weird cellphone noise you get though speakers, if you decide to not put it in airplane mode. Most likely will be dissatisfied. Start playing a song and it will pick it up and work.
NOTE: It will drain battery a bit quicker. And