we use a lm1 inovative here from time to time but ill tell you this it works great when it works. we go through alot of o2 sensors especially using race gas. for some reason even with pump gas we see alot of errors occur when tuning. we set a car up with one here at the shop and brought it to a local dyno shop just to check everything and the air fuel ratio that we set with the lm1 was damn close to his expensive wide band. hope that helps just make sure you keep a couple of o2 sensors around for it.