Yes I have used it successfully on my lap. I'm not massively tall but have 31" inside leg, so my legs aren't too short. It just about fits. Most of the time though I use it as a note-pad so I'm holding it with the keyboard folded back or removed and held in the crook of my arm in portrait mode.
I find it a little cumbersome to use the keyboard when I'm sitting on a bed or something like that as when I'm sitting cross legged there's not enough space for the kick stand on my legs so I have to put the surface down on the bed and adjust my position to suit.
I find it a little cumbersome to use the keyboard when I'm sitting on a bed or something like that as when I'm sitting cross legged there's not enough space for the kick stand on my legs so I have to put the surface down on the bed and adjust my position to suit.