hi firejeep, i've had my pioneer add-on unit in my super duty for about 4 months now.
my part of the world has a limited amount of radio stations to choose from, so it was an easy choice for me.
i'm also a news junkie and with xm i can listen to the fox news channel while on the road.
the signal coverage is exceptional, unless your stuck at red light under an overpass. i recently took a fishing trip down to tampico mexico, which is about 350 miles south of the southern most tip of texas. guess what-no interuption in service, hell i never missed a single word out of bill o'reilly's mouth while i was down there.
tons of tunes as well, 80's, country, rock, and of course the nascar channel (ch. 144).