I am currently running the smarty jr, but my truck rattles so bad that I'm thinking about getting rid of it, I also haven't had that big of fuel mileage increase with it, so I'm looking for advice and opinions on the subject. I dont have any plans on bombing my truck just looking for something different that will better "soot" me. If that means smarty SR or bully dog PMT then so be it, but I'm really interested in the edge juice with attitude and wanted to get some feed back. I love the idea of being able to adjust on the fly. Instead of always running in the high tune then having to pull over or plan ahead to program my smarty.