I love Poweramp. I've used it since my first ever smart phone (Droid X). Probably one of the things I've found it most useful for is audio books (I enjoy immersion reading, listening to the audio book as I read). Since many audio books are upwards of 10 hours long, it's insanely useful that Poweramp remembers your place even after the app is closed. However, that prevents me from being able to listen to other music, as when I come back, the file starts from the beginning. And if I do, I have to drag the slider to where it was before. With 10+ hours of audio in one file, precision is impossible. It would be a great feature if I could type in the exact time code that I would like to jump to. That way, if i want to listen to other music, I just have to keep a note of where my place is in the book, and when I come back, type in the time code and pick up right where I left off.