I have the FAST XFI SPORTSMAN, love it, it’s only laptop tunable but very easy to use, you can sit at the coffee table and build a tune or modify the existing, plug it in, two seconds later your new tune is in and running, or have a street tune and a track tune, simply drive to the race track, load the more fuel and timing tune for racing and go race, put the street tune back in it to go home on a less aggressive tune about town. if you have a low vacuum engine due to a cam you pretty much almost have to use a laptop tunable system.