I have been using the traqmate for around 3 years & its a very easy to use system. I like the fact that you dont need an engineering degree to use it. You can lay multiple laps on top of each other & put others laps on top of yours too. You can disect the lap just by clicking the cursor anywhere on the lap. You pull the dash out & plug it into your computer & download. the display on the computer is cool showing the friction circle, G's MPH ect. You can also wire other sensors like tach, afr & other sensors into it for more data, but I never have.
Now what I dont like about it. The dash display is way way too small for my almost 50 yo vision. If i dont have my reading specs on, I cant program it off the incar display. A real pain in the a$p, when I talk to the guys who invented it, they dont seem to care( I raced with them for years) , funny because most guys who drop 900 ++$ on a toy tend to be uhm aging. I find this a problem with a lot of IT types. The lap times are viewable aroud the same size as a hot lap display but with less contrast.
The competition has caught up with them with the GPS & ease of use, but with much better displays. Jegs had a sale on the gpx last week for under 800. I sold mine with my race car & Im going to try that out next, it has MPH & other stuff on a much larger display.