I have the Ultra chip(the one with the diff settings) and like it. This is kind of an old school chip, with much better ones on the market today. But, my car isn't modded that much and I don't plan on taking it to a track...so its good enough for me. I like the security feature as well. The car idles better than factory and runs cooler(you need the low temp thermostat too). Just make sure you buy the one for the factory injectors, if thats what you have. Also, don't go nuts by cranking it up too much!