Trusted Reviews looked at the Samsung SGH-P300 - Super Slim Mobile Phone. Here's a taster:

Unlike most phones, the screen in the P300 is positioned in a landscape aspect ratio, rather than the more traditional portrait mode. The 1.8in screen has a resolution of only 220 x 176, compared to the pin sharp 240 x 320 screen in the D600.

The speaker in the P300 is not as loud as other phones, and I often found myself missing calls because I couldn't hear the phone ringing, even with the ring volume set to top. As already mentioned, the P300 will happily playback MP3 files, so you can assign pretty much anything as your ring tone to add a bit of individuality, just don't expect to hear it when someone calls you.