Maybe. Out of the 9 engines we've been through, there is only 1 that has really performed well, and that's not a good enough ratio for me.
The rest either had major tuning issues, drank fuel like a bad joke, ate bearings for breakfast lunch and dinner and 1 even snapped the crank.
Add to this the poor tolerances on things like the crank diameter where the clutch bearings go on and almost all of them breaking multiple fins off the head, we had just had enough of them.
We gave them a fair shot, but we were not happy at all by the end of it.
I'm sure others have had good experiences with them, just relaying mine.