Pros: Extensive phone book that is easy to enter data into. Really clear quality. Inexpensive (I paid $39.95) Small simple phone. Gets the job done.
Cons: Not very many ring tones. Doesn't ring and vibrate at the same time... it vibrates for the first few rings then rings twice without vibrating. Can't use the callander as a wallpaper. volume buttons won't illuminate front display. The menu setup is a tad complicated as you cant get to all features through the menu feature, you must access certain options through other functions instead of having it all accessable through the main menu
Summary: Overall for the price I would say it is a good phone if you're not looking for a feature rich unit. I used to have a Samsung SPH-A620 and loved it, it was the most durable phone I ever owned! The Samsung SGH-X506/507 hardly compares to it but it is also was less than 1/2 the price.