Unfortunately I have had a lot of problems with the FAST EFI system (the old system). I use the EFI computer along with the FAST e-Dist (distributorless ignition), and the FAST Data Logger.
I experienced "no start" conditions at least a dozen times in the last year (twice at the starting line during eliminations). I have also experienced high rpm ignition cut out, sudden lean conditions for .2-.3 seconds (up to 15.5:1 A/F ratio), sudden rich conditions for .2-.3 seconds (down to 10:1 A/F ratio), and the data logger did not work on about 5% of my runs. Without touching a thing, it might work great the next run. FAST has offered to "lend" me a replacement EFI, e-Dist, and Data Logger at the races, but they won't swap mine out and when I send it to them for testing they always show "no problem found".
The staff their try to help, but usually don't identify the problem. The tech guys at the races (they usually have someone at the NHRA national events) are parts changers.
I hope the new system is better, but I have too much invested in this system (~$3500) to just scrap it and try their new system. I have spend ~$350 in Fed-Ex overnight charges sending it back and forth to them (I've sent it back ~6 or 7 times in the past 1 1/2 years) trying to get the problem solved before the next race. I am running the system at a much higher rpm than most of their customers (~12k rpm).
I don't have anyone else to recommend and I hope I'm the only Lemon that they have out there.