Uhhhh ummmh aahh!! I would rate SK2 *8*.. Since that I owns it for 2 years, Original SK2 owner... Keyboard works as great as it were new but the keyboard cover sticker came loose and is bulging ( I actually peeeeeled it off to reveal yellow dotty lights!! Cool!) The "Menu" button is worn. had struggle to get menu drop down. I like scroll wheel better than SK3... BUT it's pretty rugged through my abusive thumb..