I can relate, not on a 7.3 level, but a warren injector level. I went with his injectors based on the price, and great customer service I had heard. I put 190/75s in my truck. First problem I had was an o ring. Got that fixed. Next, truck was throwing a code for cylinder 1. Jess sends me a new injector no questions asked, get that resolved. Now, had the truck scanned, #4 and #6 are shot. It starts rough, blows white smoke, and has a bad skip. Same day I had it scanned, called Jess, and he's sending me 8 new injectors and covering the bill. Given, I've had my issues with these injectors, but nothing hasn't been taken care of in a timely, professional manner. Ready to see them on my door and get this thing running right.