I put another handful of flights on mine this weekend, and have more comments. The 3W 18-8 will probably stay on the airplane, since I like its characteristics. It also creates a lot of braking which is nice, since I can literally dive it to the ground, then flare it and land it in a short distance. It doesn't seem to build up a lot of speed on the downlines.
Landings are real easy and very gentle. I just start a flare about a foot off the ground then let it ease closer and closer. I keep it off until I have just about full up elevator. At this point it either makes a nice 3 point landing, or the tail touches then the mains. Never a hit of a dropped wing. When in 3D rates, its wild. You can give it the sticks and it will wind it self up into a nice little ball, tumble into wild gyrations, etc.

I had it in an inverted flat climbing spin by just adding power and playing with the sticks once I enter the spin.
I get about 12 minutes per flight with the supplied fuel tank. I do notice a trim change during the flight about 1/2 to 2/3rds in to the flight due to the fuel tank placement. As I burn off the fuel, it need some down added. When I take off on the next flight, I have to add a click of up trim.
All in all, its definitely a keeper!