I quite like the lock switch - I do wish they had included two more physical buttons though - one as a "home shortcut" to your default desktop (The G1 had this and it was quite useful) and another to put the phone into "phone mode" - currently if i'm holding the phone in portrait ready to make a call I have to navigate to the phone mode icon on a sideways screen - only nice to haves though, all in all I can't fault the n900.