I've brought my drift car, 240sx coupe, in for some performance mods. Z sport happens to be a NisTune dealer, which is a Real-Time Tunable Daughterboard for your ECU, turning it into a fully tunable stand-alone unit out of your stock Nissan ECU. I saved about $600 - 700 by going this route rather than getting Haltech or Apexi Power FC. I had my car dyno tuned, made about an extra 50hp, and the powerband was just perfect for drifting. Until this was done, I wasn't able to step on the gas and smoke the tires in 3rd! And the response was INSTANT!
Pros: TWO Dynos in shop! AWD Dyno too! Everyone knows their stuff!