The proprietary file management software, Yepp AudioManager, is a basic program that gets the job done, lets you rip directly from CDs, and sends files quickly to the player through a USB 1.1 connection. Its speed is important--you'll be using software often, as the player has only 64MB of internal memory and no expansion slots. So, while the YP-90S is a great companion for a jog (it can hold about 15 songs at 128 kbps), it isn't suitable for longer journeys. It omits rechargeable batteries, too, meaning you'll burn through a set of AAAs in a week if you use the YP-90S a couple of hours a day. As a bonus, the player comes with an FM tuner and the ability to record through the internal microphone (but it has no line-in).
UPSHOT: You can't beat the size and sound of Samsung's Yepp YP-90S, but it can hold only an hour or so of music. By Michael Gowan