A while ago I decided that a Tech II would be handy, but the hand held unit was way over what I was prepared to pay. With a little research I found it was possible to connect an GM MDI unit to an existing laptop and use Tech II Win. I purchased the GM MDI clone from Buy Products Online from China Wholesalers at Aliexpress.com (there are other sellers on ebay and elsewhere so please do your own research. I got the first generation rounder looking unit.). With an older laptop, vmware player and some searching I was able to find the software online. Some sellers offer a HDD at extra cost. So far I have used it to reprogram my remote fobs, run an ABS purge and diagnose an ABS issue. Nothing earth shattering but everything worked. Thought I would share