Crash,

Starting up in the hobby again after a long break since the 80's, the GP Ultimate was the second kit I built. The first one was the Sig SE.
The SE definetly is an easier build, however, the Ultmate is not hard either. The parts don't fit as nicely as the laser cut Sig kit, and as havac21 pointed out, you have two wings to build and the incidence to set up. Neither of which is hard, just takes a little more time to get right and you need the right tools.

To me, the hardest part was getting used to the orientation of the Ultimate when flying. Since the wings are rather short, it appears more like a box in the sky and in the beginning I often found myself unsure of the orientation.

The Ultimate is a great flying plane and I don't think you'll have much problems with it.

Good luck,

tychoc