I trip isnt bad. I have use one for about a 2years, or so. It has its pros and cons. No batterys needed to run it, runs off your Ipods battery, which in return uses more juice. Never had a prob with picking up other peoples Ipods nor stations in larger towns, Twin Cities and Denver have been fine.
Decided I would hard wire to aux though but sound quality will always suck on a Ipod vs a CD. Make sure if you use it match the volumes of the deck and Ipod, keeping them the same, less distortion.
Another thing is Harmon Kardons new controler which is decent. I have been thinking about getting it until Eclipse decides to figure out WTF they are going to do.
http://www.harmankardon.com/drive-1/tour.aspx
Alpine or Clarions higher end models seem the way to go. Just not for me