Excellent.

I prefer this app verses the built-in music app.
You can add songs over WiFi and 3G. Thats right, you dont have to be connected to WiFi!

The app works pretty well for me, Ive only encountered one bug so far. Avoid using the lockscreen music controls (or those embedded in Control Center for that matter) as it seems to cause the app to glitch up a bit.

Andrew Alarie about EZMP3 Player, v1.5.1