The problem I have with the T505 is it sometimes, OK quite often, picks frequencies that are slightly dirty.
I'd much rather program station frequencies myself.
The other "problem" is is take a few too many steps to get rolling.
Hold the power button for 3 seconds then hit the FM TX button, call me lazy but I'd rather have it start up with the car.
It sounds a little better than my Sirius radio, when it's on a good higher frequency. No problem there.
I'm on 103.5 which is great in my area so I have to be careful NOT to change it by mistake.
Did some quick searching and it appears to be an involved install.
There is an adapter
here that I'm sure will help.