I have only had XM for about a year (Mrs. rallen13 gave it to me for Christmas, best present she has ever given me) and have loved every minute of it. I have never heard Sirius, so I have nothing to compare. Thus, based on my age (shhhhh!), I have to say that the changes have not disappointed me except for Spa replacing Audio Visions. It doesn't seem quite the same, but it still isn't what I would call bad. I listen to 40's, 50's, 60's, Love Songs, Sinatra Standards, Spa, Old Time Radio, Escape, Laugh USA, and Classical Pops, plus CNN and all the Play-By-Play from NHL, NFL, MLB, MNACAR, Indy and even PGA on occasion. I have found no less quality of programming or sound on any of these. Not to say that others with different receivers don't. I am quite satisfied, especially considering what ISN'T on the air in Houston worth listening to.