I had my zzp tune in my car for almost a year and a half with no problems what so ever, the car ran great. Then i went to get it emissioned so i could get my tags and it failed due to crazy high NOx. So i took it to school and with a scan tool figured out they turned off my egr.So i thought no big deal i will just find a tuner and get it turned back on, well found a tuner and he tried everything he could to get into the stupid thing but it was locked. Now im kinda irratated, for one on zzp's website it says the car WILL pass emissions with this pcm. Mine did not. And then it also says they DO NOT lock there pcm's so you can tune it down the road. Well that wasnt so true either. Oh and when i was in the computer with a scan tool i also found they didnt program in the right VIN. Whatever. So i just bought another computer and had it tuned and all is well now. I couldnt be too angry tho, for $100 bucks the car ran great. I guess i was just more irratated that they werent exactly honest on there website.