Excellent
After trying isub I gave z-subsonic a chance as well and have been using it everyday. It is perfect for me. I mainly listen to custom playlist as I commute. The shuffle feature which shows you upcoming tracks is awesome. You can even reshuffle while the current track is playing. The best feature for me is that the app reconnects to your playlist where you left off flawlessly day after day over 3G or wifi, something that isub cant do. I have finally found something that is better than simplify was. Only improvement to request would be to increase the playlist restriction from 1000 to something higher - but overall great app.
Bladerunner5 about
Z-Subsonic