Since this is the Beginners forum, I'll take a gander and suggest you stay away from them for now. Once you get used to the speed of the "normal" props, then "upgrade" to the APC props.

Reading the post above will make you believe that you will have no power with the Master Airscrew props. Although you _will_ have diminished power, there will be plenty of power to learn to fly and basic aerobatics. It is only when you move into advanced aerobatics that you will need the power of the APC prop. (And possibly a different airframe)

I used to have a normal 40-sized trainer with a "normal" prop and the recommended flying surface throw. After it got boring, I "upgraded" to an APC prop and modified the flying surface throw a little. That airplane became a completely different flying machine.

Rafael