Not sure what's "sketchy" about it.
Buy cable off Amazon/eBay/Etc. "Mini VCI J2534 Cable" Its just an OBDII to USB cable.
Looks like this. Cable may or may not be clear.
Mine was like
$30.
DO NOT USE THE SOFTWARE THEY PROVIDE. Its full of viruses and s***.
Install the stuff on an old junk laptop. Win 10 or older if you can. Bought a refurb Dell of Amazon for like $120.
It's just for TS it doesn't need to be fast or have a bunch of storage. Mine has 4GB RAM, i3, and a 128GB SSD. Hell a 64GB is more than big enough if you use it right.
Download "VirtualBox" and the TechStream version provided on here in the
How-To: TechStream In 5 Minutes.
The TS image on here is Windows XP with the TS program installed.
Just run that image.
I'd plug in the USB after it loads just so it connects properly. You'll here the USB connection for the OS o the laptop followed by the sound of the USB connecting on the virtual machine (VirtualBox).
The first thing they play is what it sounds like on XP.