They are great. Very easy to read and the quality is very good. My only complaint was that I did not have the correct outlet on my laptop to tune and calibrate the warnings, so I had to buy an adapter. They use the VGA plug on their gauge for data transfer which makes it a little tricky but like I said, I like them a lot.
i've run those on a few performance cars. Always really liked them.
You can get a VGA to USB adapter for like a buck on amazon since no laptops in the modern world have a VGA port anymore.