I guess I get to be the asshole here.

I took my old Z with Nistune in to get its first tune. I was told that it shouldn't take too long, one day to look the car over, and 3-4 hours to tune it. Sounded great. The tuner called me to ask me how high he should rev the car. Red flag. Shouldn't he have that knowledge already? Once that was figured out, an exhaust gasket or the flex pipe blew, I don't know which, because it wasn't communicated to me which was actually the problem. In fact, there wasn't much communication at all. Over the two week period that my car was there, I may have had two phone calls returned. Yes, two weeks. He said he had difficulties with this or that, and in the end, I ended up paying almost $800 for an exhaust leak fix, spark plugs that were replaced that I didn't ask for (they were brand new, and were thrown away), and a shitty tune that barely starts my car. When I went to pick up my car, it took them 20 minutes to bring me my car. I was advised that "it runs fine as soon as it warms up." I guess that is true, but getting it to start from cold is extremely difficult. It's rich as shit. Ridiculously rich. The wideband barely changes from 7.4, which is the lower limit. The timing in his tune didn't even match the timing on the car.

Adrenaline may be great for Hondas and all of the other cars that have common aftermarket support. If you have Nistune, you may want to look elsewhere. At the very least, I should have been advised to go somewhere else.