RE: Moving up to Aerobatics
The stik is a wonderful plane that won't tip stall on you during a too slow landing approach, in fact it's hard to tip stall them on purpose. (snap roll)
If you just have to jump to an Extra, Edge, etc, be sure to start with the plane balanced on the forward edge of the recommended CG range and use low (trainer like) control surface throws at first. The recommended throws in the manual assume you are an experienced aerobatic pilot.