Both kits are excellent!

The GP is a great Throw-it-in-the-car-and-go-flying plane, and the Goldberg is a bit more impressive.

Both are outstanding aerobats.

The GP matches up great with a 70ish 4-stroke while the CGM is good for anything from a 91 to a 150 (100 - 120 being optimal)

The Goldberg size also lends itself well to a smoker.