F.I. Tech or Holley sniper. Opinions from users.

I have had a problem with my F.I. on my car and the short coming was I didn't know what was wrong. I had to have the car flat bedded home and next day when it was cold started right up. Again when hot no start. This is the problem I see with this Technology, not being able to figure out what is wrong and how to fix it. I put carbs back on to remedy the problem. Sent the units back, dual throttle bodies on a gen 2 hemi, and ECU was bad and replaced under warranty. I'm waiting for warmer weather to put them back on and see how it runs. Before this problem, no start when hot, car ran fine for 2 years.