I prefer the SD card versions of the Racepaks. Much easier to pull the SD card and take it in the trailer to the laptop. Rather than taking the laptop and serial cord to the car. I have a dash as well but did not use it in the S/ST car. I prefer gauges to see what is happening real time. Dash can be hard to read but I imagine once you get used to it it is fine. We did have the dash in the heads up car.