I have always been skeptical about these OBD2 chips. But I went out on a limb and decided to get one. The InstantHP one had the most professional look to it. So I ordered it. And it definitely made me rethink OBD2 tuners. It’s works amazing. My Dodge Dart GT had terrible throttle lag from the factory, and it corrected it to near instant reaction. It also has a bit more pep to it when climbing the RPMs. And it also gets rid of the emmision friendly tune of holding the RPMs a bit after letting off the gas, so now the RPMs drop much quicker and the car sounds a lot meaner. Best thing I’ve bought yet. I wish I would have done it right after I bought it.