before you buy try the sample software from the makers websites.haltech and speedpro have free downloads.the haltech is dos based but it doesnt take long to get the hang of it.i am thinking of running haltech on my z turbo because i got some free coil-on plug coils and a harness from a 2000 model f150 pick up so i have all the connectors i need to build a nice harness.just got a free laptop too.