I bought one at the Toledo RC show. While it flies, it's really marginal on the stock 3S 15C pack. Plus, the landing gear had to be bent / lowered in the rear to get the plane to rotate.

Converting to a 4S made it a real nice flyer but it really should have come with a 4S to start with in the first place. I reinforced the elevator and added stronger metal gear elevator servos. It's quite the flyer now. 57 mm thrust tubes helped too with time taken to make the square exhausts more oval.

Here is video on Youtube.

Sapac F22 with a 4S battery (2 min 29 sec)