I occasionally listen online and don't notice any problems with the sound quality. My on-board radio cuts out a lot when I'm driving on the road that runs north-south of my home. The road is on a lake with raising terrain perhaps 500-1000 feet which I think blocks on the satellite signal (it's the same on two cars I own with Sirius). I'm on the west coast and I think probably anyone east of me by maybe 1000 miles would not have as much of a problem as the satellite would be "higher" for them.