What is the deal with these things? I am looking for a good one for my 6.8 V10. Not looking for better mileage (it would be a plus) just something that I can do even better with towing and maybe a little more pickup here and there. I am really happy with my truck, so I am leaning towards it is not worth it. Anybody have any opinions. I have looked at SuperChips and Hypertech. I have found a few on Ebay at good prices. What does the installation entail? Can you really just plug in and play? Now for the big question: warranty? Will this kill my warranty even if I set it back to stock. Will they really notice it? I am just thinking. Any input would be great.