the keypad is very bad in my opinion, for action games, and the slide up feature is sometimes quiet stiff, but the sound is great, makes the k800i sound like a radio, lol, the colours are much richer than the k800i aswell, but if i had to choose between the w580i or k800i, i would pick the k800i by far because of the camera, some other letdowns from the w580i are no flash/light 2.0 megapixel camera which a lot of se phones have, and i was a bit dissapointed when i found out that you had to hold the walkman button to swap track in the shake function.....