I really like it. Easy sync with iOS. Not only music, but also contacts, calendar, all that jazz. Even though I use Firefox for browsing on OS X, I still find it handy to use safari for browsing where I left from iOS. Transcoding from FLAC to ALAC is easy and fast with XLD[1]. There's the nice visualizer from SoundSpectrum called WhiteCap[2] (free version is included). Organization is simple.