After some delay (a month since I ordered it) I received the performance tuner for my 1.9 150 yesterday. Due to the delay in receiving it and concerns with the companies business practices I was hesitant to install the unit. After some thought I decided to at least give it a try. The install was fairly easy, although I was left questioning the thoroughness of the company after reading the part of the directions where it says "When it comes to connecting the plugs you may find a minor alteration is required to enable them to fit perfectly. This involves removing some ridges on the plugs with a sharp knife." Anyhow I found I was able to make the connections with little ta do. The tuner has adjustability built into it. basically its just a little screw you turn with a small straight screw driver. Mine came set at about the 1 o'clock. The directions say to turn it CW to increase power and CCW to back down the gains. With the tuner set at about 1 o'clock there was what I would call a noticeable difference in the mid range power. Seemed to come on harder and faster. I think I am going to turn the screw two more clicks CW and see what it does. I to go out with a stop watch and time the car with and without the tuner installed. Maybe try 30-60 and 60-80 timed pulls to see how much difference there is. Anyhow, guess that is all for now. I will be sure to get back with more results as they happen.