No! It is 'free rein' as in the reins of a horse, letting the horse run, not the reign of kings. You are correct with 'lose' and 'loose' however, although there's only about three people left in the world who seem to know it. There's no place in the English language for 'off of' either, but try telling the internet that. Regarding the Surface: seven hours battery life for the ARM version suggests that it's going to be pretty horrible on the Atom version.