I ran one for a while on my 331 turbo notch and it was great. There's a bit of a learning curve if you don't know how efi and the computer works but it's not bad. Plus there are great sites out there with a lot of help...like eectuning.org. If you get one, definitely get the Binary Editor and EEC Analyzer by Clint Garrity (the absolute best software out there). He's on eectuning.org by the way.

I will be using the QH on my 2.3t '86 Coupe when it's finished.