I've had Sirius for almost a year and i must say it is great! the stations are always coming in clear , even in the city. the signal rarely cuts out, even when traveling under bridges and overpasses. the only time it has cut out was when i went through the new tunnel in boston, and even at that, it took a good 15 seconds AFTER i entered the tunnel (1/8 mile in) As for the receivers, i have the first generation audiovox, and it has performed flawlessly. The FM modulator is ok, i still get some interference on the 88.5 in some areas. programming on sirius is great, very diverse. i am a huge fan of the rawdog comedy channel. well worth the money, and highly recommended