I have a Sky Scooter. The basic problem is that in the stock format the plane can just barely fly. If you still have the plane and want to try it again, some inexpensive fixes that add more power/performance are:

Increase your battery pack by one cell. The ESC and motor will handle one additional cell with no problem. Depending on the pack configuration you may need to enlarge the battery compartment by using a SHARP #11 blade.

Put a gearbox on with a 3:1 ratio

Use the front part of a plastic spoon to make an air scoop for better motor cooling. Be sure to open up the outlet side of the motor so the additional air can get out

The additional cell and the gearbox make a world of difference in the flying ability of the plane.

Hope this helps.