CNET have published a review of the Samsung S2 Pebble (1GB, purple) MP3 player. 'Unlike nearly all other MP3 players, the front of the Samsung S2 Pebble is almost completely plain, except for a large, oblong LED that glows from beneath the outer shell to let you know the status of the device. The controls are housed on the back side and are indented in a bowl shape, which gives them a nice feel. A central play/pause/power key--the only bit of silver on the device--is surrounded by track shuttle and volume buttons.
Jutting out from the bottom right of the control pad is a smart key, which is used for placing the player in shuffle or playlist mode, turning the LED function on and off, and switching through a set of three sound effects: Normal (flat), Studio, and Concert Hall. The playlist mode is a nice extra that lets you create and listen to an on-the-go playlist. The S2 plays back files in the MP3, WMA, and OGG formats.
Read: Samsung S2 Pebble (1GB, purple) - CNET