think to use it as a real lap timer. Its very cheap to buy a real lap timer that will record all your laps without taking any of your thoughts away from driving while on the track.

 

On mine, the chrono-wart was great for timing my commute the first few days...... but other than that, it is pretty useless.

I get a lot of "what does that thing do?" from passengers...so I guess it also serves as a conversation point.