Back in the day I used to look at the Top 10 list on what.cd, download torrents of interesting music, add them to my seedbox, wait for them to finish, download the files from the seedbox, import into iTunes, fix up the tags and artwork if needed, then finally sync to my phone. Then I'd have to do all that again for my girlfriend and the terrible music she liked.
Now I just have to hit one download button in Music on my phone. I have unlimited access to--as far as it matters to me--basically the entire iTunes libary. My wife does too, and she can play it through the Sonos system at the house. It's great and well worth the $15/month and various UI glitches.