Anyone used ipod w/ Kensington RDS

Was just wondering if anyone has tried this unit. It is supposed to display song info using RDS over your existing radio if it's RDS compatable. It would be nice if it worked because it can be moved to any car you want with no wiring hassles. Any positive or negative opinions out there?

Kensington Model 33364

http://www.bestbuy.com/site/olspage.jsp?sk...d=1142299269590