I've owned O.S., Saito, Thunder Tiger, Magnum, Super Tigre, and GMS engines and I've been happy with all of them. I've thought about trying Evolution, but they're as expensive as a good engine and they have the reputation for reliablity that an inexpensive engine offers.

I guess finicky and expensive just doesn't offer much appeal to me. It just seems that there are at least two less expensive choices in every size category that offer the same or better reputation than Evo.