i dunno its pretty neat. but liek ive said in other post.. i got all the heardware for free i just pay the monthly.. big deal. and it is better than FM thats for sure.. and the comercials are mostly on the station xm uses from other companys like mtv, which xm has no control over.. they rarly do comercials on there own stations, i mean you pay for cable or satilite tv every month, and thats loaded with ad's? i mean i sell the xm radio at work.. and we sell more than i would have thought