Before my son decided to choose them he tried to read up as much as he could. The initial reviews were great and no one was talking about problems. The company's founder sounded legitimately knowledgeable about efi technology and his design was supposed to be a revolutionary step forward. My biggest gripe so far is the lack of quality in their instructions. If they would set up a better (more comprehensive) manual that had an explicit troubleshooting guide I think a lot more people would be happy. By now the word has gotten out that folks are experiencing problems. It's got to be affecting their sales. The thing that keeps me hopeful are the guys that finally got their systems dialed in and rave about them. Right now I'm not willing to say the FAST efi is junk but I'm not shy about giving my opinion on their documentation.