I used fitech on a 400m, it was the cheapest/easiest bolt-on fuel injection at the time and I don't regret it one bit. Their customer service helped me with tuning and wasn't the worst ever. Now with all of that said, it was definitely a "you get what you pay for" situation. The holley setups are much better but have a higher price tag. If you are not crazy about tuning and fine with a simple setup, nothing wrong with fitech in my opinion (as of 3 or 4 years ago, I haven't dealt with them recently).