I am getting ready to go pick up my new 2012 1.8 Versa S+ hatchaback with 6spd manual trans. I ran across the Bully Dog website and this thing sounds like it can make a significant improvement in MPG or performance depending on the tuning set you select. Also supposed to give real time stats on engine, speed, and a bunch of other cools stuff. Has anyone used this and if so what was your experience. Price doesn;t look bad if it does everything it claims.