I'm using ECMlink with speed density making roughly 400whp and the car drives 100% stock around town without any kind of hickups at all. I found speed density far easier to setup than I expected. It also drives far better than I expected.
I'm going to take a multimeter to it tomorrow, I'm having other issues as well. the car drives like shit with A/C on and it doesn't like to idle with the load of the compressor.