Plus you're listening to what they are streaming which may, or may not be, exactly what you would like to listen to. I like my USB because there are no commercials and the playlist is MY Play List with ONLY the songs that I like on it. Not "extra" or "sort-of-related" songs that I never heard before and don't really like... but exactly what I want to hear.
I just bought a set of 8 USB's (8 gigs each) which hold I think roughly 1,200 songs at the high quality MP3 rate (320K/S); more songs at the lower rates... I'll have sticks for: (A) Compleat Beatles Compilation, (B) Alt Jazz, (C) Alt Christmas, (D) Trip Hop & Related, (E) Alt Country, (F) World Music, (G) Alt '80's, (F) Rock n Roll, (G) Alt EZ Listening.
I'll come up with a mix for the 8th USB...