I always us this to listen to audiobooks. Apples 2X speed is way too fast. Speedup lets you set the speed in 10% increments. I usually listen at 1.3 or 1.4X. It is also great that SpeedUp Player keeps its own playlist, so you can play music in the Music/iPod app and come back to SpeedUp to continue where you left off. I just wish it would tell you how much time is left at the current playback speed.
Grogor! about SpeedUp Player Pro