Some time ago I broke down and rated all the music I care about in iTunes. Not long after I became quite fed up with iTunes and would love to stop using it and would, if not for all the time I put into rating my music! What to do?
My top preference is Google Music, but I'm having a heck of a time getting playlists to import correctly from either iTunes or WMP. I'm a big fan of Google, but despite the multitude of great ideas they put out there, implementation of them is often a bit lacking, as if they got to 95% complete and got bored. Google Music is an example of that, IMO. I like using it, but getting it to work the way I want has been challenging.
I bought PowerAmp for Android some time ago and it's a good player, but not an importer/syncer.
Amazon mp3 player is really nice, IMO, and you can play music stored locally or stream from your Amazon music cloud drive thingy but again, I haven't got ratings or playlists to import.
doubleTwist has a lot of promise and the Android app is nice, but holy cow, the Windows desktop client crashes more than anything I've ever experienced! I tried DT for the first time maybe 18 months ago and gave up on it for the terrible desktop user experience and it seems to have gotten worse since then. Three attempts in the past day, three lock-ups. Had to go into the Task Manager to kill it. Wow.
Making it worse, when DT finally found all my iTunes music and playlists, it threw extra songs into my playlists that didn't belong. My 5-star auto playlists had about 20 songs that weren't rated or were below 5 stars, for example. Similar things happened on multiple playlists.
That said, even though DT did lock up every time on the desktop and made for a horrible user experience, apparently it did successfully importe my selected iTunes playlists and music to my phone and, since the playlists it imported are in the .m3u format, now my Amazon player, PowerAmp, Google Music, and DT can all find the playlists and play them.
So I guess I've got what I set out to do, through much gnashing of teeth.
I think I'll try iSyncr next, though. I'd gladly pay $2.99 to avoid having to fight this battle in the future. Now, if only I could export my iTunes ratings to Google Music....