Been using this since AUG after seeing a friend's and have been impressed with how simple it is to operate. Normally $199, I just noticed it's on sale now for $134 https://dragymotorsports.com/ (same price on amazon too). Use it to measure 0-60mph, 60-130mph, 0-100kmh, 0-200kmh, 1/8 mile, 1/4 mile, 1/2 mile performance, etc. Can switch to mph or kmh