I've got a Saito 1.8 in mine. Plenty of power, but a gas hog. What a sweet flyer. One of the best ARF's I've purchased. Hanger 9's quality sure has improved in the last year or so.

If you're planning on runnin' a 1.8 Saito, I would suggest a larger fuel tank than the one supplied with the kit. I believe I increased the tank size by about 6 ounces.