Here was the sellers response when I asked him if the Surface Pro 3 would work: I am able to get the unit to connect to the car, but I get an error when trying to perform diagnostics. The error was that it requires Windows 7 Pro.
I have a Surface Pro 3 with an i5 and 8 gb of ram running Windows 10 and tried the direct install which failed. I received a unit from the exact seller above yesterday and have not been able to get it to work.