Its decent, but not great.

You can play the songs without Wifi as long as you play them with Wifi first. But you need Wifi to add a song to your playlist. The offline feature is one I appreciate, since Im having trouble with apps that allow you to play songs without Wifi. Ads do pop up, and you have to be fast to click the x in the corner of them.
For a while, I thought this app was fantastic. Then one day, none of my songs would play without Wifi. When I opened the app today, it crashed. When I tried again (three more times!), it kept crashing. Im disappointed, it really is a pretty good app.

Writer Girl 2 about SongFlip - Free Music Streamer, v1.0.2