Im sure the cortex is fine but for $10 more you can get a better unit in the bdgt. It is fast and easy to install. The monitor can be personalized to your liking and I enjoy the driving coach as it helps me stay out of the throttle to save gas. I have mine mounted to the rearview mirror using the blendmount and is a very clean install. You can monitor and set alarm limits with the bdgt. I also like the performance testing option that will give you o-60 time, 60 ft and 1/8-1/4 mile time with mph. Now the cortex wont do that! If you are gonna get a new one I would call autoanything and haggle with them on the price. I got mine for $355 to the door and the reg price was $399.