It is impossible to rate each presentation separately, the individual reviews never download so there is no way to know what each story will bring. Some of the narrators are excellent and present high quality recordings. Some are simply terrible and listening to them is torture. There is no quality control as some novels have recording problems. There is no way to stop, start or pause with the screen locked. As these recordings are free, the advertisements are to be expected however the ads with sound are obnoxious and intrusive. As it is not possible to use any of the controls with the screen locked, having to stop in mid reading causes the presentation to switch to an add. Thats where the loud music from "Walapop" or other ads with sound intrude. With some of these problems attended to, I would not have a problem paying for these recordings.