Positive endorsement
About four years ago, a friend of mine bought a Superior kit engine through Aero Engines of Winchester for his RV-8 project. They assembled the engine in their shop, and even allowed the two of us to participate in the assembly. I felt like they were a first class operation, and the assembled kit engine came at an attractive price. The only reason I didn't do the same thing when I bought my engine was becasue of Superior's financial difficulites.
I would give them a positive endorsement.