I have a smarty s03 cummins programer. This smarty isnt very old. I have had it for about 2 mouths. I bought it from my friend and he bought it new about 2 mouths before i bought it from him. Its a nice chip and it gives your truck lots of power and black smoke. It also gives your truck good throttle response. I would like to get my money back but would settle for alittle less if i had to. If you are interested just comment me and offer me your best offer. I payed 500.00 for it and i know it cost 650.00 new. Thanks kyle