I've owned the latest JetCats, EvoJet, and Kingtech turbines. All have run great. I lean towards JetCat because IMO, Bob Wilcox at JetCat is the gold standard for customer service in this hobby. Barry at Kingtech has been very good as well and has gone above and beyond for me. EvoJet service is in Germany, which is great for Europeans, but not so much for Americans. With that said, I've never had a single issue with my EvoJet engines.