You asked about the tune in my 1.8. I immediately saw an increase in performance felt like it picked up a few hp and a little more pull from the line. Overall it was a dramatic improvement kinda reminded me of my 2.2 5speed. The biggest turn off for me was the need to use premium fuel all the time. I am on the fence about tuning my Eco for that reason. I hate to say I think my 1.8 LS had some performance problems overall but the tune helped. If you are looking for better off the line, do it. I am not sure if it helped my MPG or not. I heard you can get the same thing from a CAI which I never bought.