I finished mine last year, but did not fly it until this spring. It flies great, once it is in the air, but ground loops like a son-of-a-gun on takeoff. The last time, I tried to recover from a squirrelly takeoff, and the prop bit the ground and flipped the plane around damaging wheel pants, tail feathers, and landing gear. I am near finished with repairs now.

I have a Saito .72 (inverted) in mine, finished as on the box (red/white) with all graphics in Monokote (don't use the star stickers, they don't match). I moved my landing gear back 1/2" and twisted in 1 degree of washout in wings. I tried for 2 degrees, but they were too rigid to twist, even with soaking and weighting. GP website tells you about the washout and moving landing gear in their tech update.

Take off from grass, not pavement. That will help (so I'm told) keeping it straight on takeoff, and I plan on doing that when I get mine back together. I did not like the recommended aileron rates in the plans (too mild), and plan on increasing them, but other rates were good. I have not had any problems with stalling as others have mentioned.

I ran my antenna out the bottom and connected it to the tail gear with a rubber band. The landing gear held up well (until my last crashed takeoff), although I did build in balsa gussets at the outside of the gear where it meets the fuse. This not only looks better, but it gives the aluminum some added support from flexing at the bend.

These are really great looking planes, and a fun kit to put together, but be careful on takeoff!!
Pilgrim