a VTEC controller is totally useless unless you have done MAJOR engine work, now when I say MAJOR I mean extremely larger cams, pistons etc. etc. etc.

pretty much a whole engine change, and your car now revs to a higher RPM etc.

DO NOT BOTHER WITH A VTEC CONTROLLER if you have a standard or minimal modified vtec engine, the crossover from factory is set to that point as it is the optimal position, changing the position on a normal engine can cause damage to your engine.

so NO I WOULD NOT RECOMMENT ONE unless you've gone out and spent thousands apon thousands on engine modifications.