I few of the guys at the field I fly at have this engine and it is very reliable and pulls a 12-14 lb. plane like crazy. I have a BME 44 on the AW profile turning a BME 21 x 8 prop at 6800 rpm and the plane is awesome. First flight yesterday and a bunch more today. Only thing I didn't like about the Brison is that you have to do the mods to mount the engine as for the BME it mounts on rails.