The Hypertech tuner is easy to use, but not all the options were available during programing. The 350Z is stored during the winter, but I did have one nice day to try out the new tune and make sure the car was running right. The throttle response is sharper and the car does seem to be a little quicker, but I won't know just how much improvement there is until spring. I was impressed with testing of the product that Hypertech does and is one of the reasons I bought the tuner.
Not much help
Actually I had the cold air intake and this chip installed at the same time. According to advertising, I should be getting about 4 gallon better MPG and 35-45 hp increase with both systems installed. I have had maybe a slight increase in MPG and a noticable but undetermined increase in HP. While it is impossible to differenciate between the performance effect of the intake and the chip, I suspect the two systems compliment each other. I am satisfied with the purchases and would do it again.