Overall, I am satisfied. However, I am a novice at modifications, so adjusting the shift points was a bit tricky. I did not get the real fuel milage gains that I thought I would get. But, I did get some improvement with power gains. I would say that this product combined with other power gaining products would be great. I am satisfied with the product and I am glad that I got it. I look forward to its proformance when I continue to modify the truck.