If you want it and can afford it,it will definatly increase performance and fuel economy.The hot tip is the electronic controller,so you do not have to manually activate it!!The stall and rear gears need to match the performance or economy your looking for.I had a video ,or I think theres one on the GV website showing full throttle shifts from a stand still,quite impressive,not to mention the unique sound it makes by not letting the rpms drop too much.Overall its a good quality built piece that holds it value and adds value to anything its attached too.Think of power shifting a motorcycle thru the gears and put a good v-8 sound to it.