Eric, This is the first time I've ever had any problems with it. It has always been reliable and super easy to start...great transition...and more than enough power to haul my 42 lb. P-47 around scale-like at 1/2 throttle. Vibration isn't bad at all.
In all, I think it is a great engine. Tomorrow, I'm going to pull the plate off of the carb and see if I can find this "screen" that could be causing my trouble...I've been lucky so far, I've never had a problem that required more than set screw adjustments!
Good luck and happy flying,
Rob / Pickupsticks