I bought my Tech2 from obd2tool and it works great. Cannot really compare software with a Tech2 as that is comparing hardware to a program. That being said, there is a software side of things that work alongside the Tech2 which is the TIS2000 software. Getting that working is a bit of a project in and of itself as the software is old and seems to work best on Windows XP. The TIS2000 software is really not needed to use the Tech2 though - that is needed if you want to update the firmware in the various modules in your vehicle like the ECU, BCM, DDM, etc.