got one in my 32 gtr, i ran it on the dyno and the guys at JEM told me it was tuned for a circuit setup as it went rich in the high revs. it removes speed cut, raises ur rev limit (8200rpm for me) and its good for the basic bolt on mods (fmic, boost, full exhaust, airfilter etc.). but if your geting a bigger turbo etc then go with a tuneable ecu
wouldnt pay more then 200 for one tho.