Ive had this app for over three years and I have never deleted it once, despite an ongoing struggle with low space that lasted for eleven months (now that I have the iPhone 6, thats no longer an issue). Its fluidity is amazing and I am yet to encounter any type of bug whatsoever. Its diversity in terms of features like crossfade and Refuse to play Nickelback make it highly preferable over the queueing feature that was recently implemented in the default Music app, which I personally have found to be extensively buggy. Overall, this app is amazing and I highly recommend it with no complaints. In fact, my only suggestion would be an update with different colored themes, as the purple can be bothersome to some guys who may have this app. Definitely worth the money!