Personally I would always stick with the well known brands of APR, REVO, GIAC, Superchips and Custom Code. REVO, GIAC and APR are the big three in the USA along with Unitronic (to a lesser degree) and these put large amounts of money into research and development. I'm not saying that the smaller tuners aren't as good, but there is more support and back-up with the larger tuners and they are constantly evolving and developing maps on their cars.