currently it does not allow subselected surfaces. the command simply quits without anything happening. one has to explode or extract and later rejoin the surface. which is when modelling on a bigger structure very bothersome.
also on Rhino for Mac if you choose a direction i would assume the camera looks into the direction of the indicated arrow, but suprisingly it switches the direction meaning i would have to flip the selection with the arrow showing to the current camera which is pretty unlogical, at least to me