[Perfectlap]

bt,
if you get the v1 and I highly recommend it for new drivers (speeding tickets and less than 5 years driving experience is a BAD combination) definitely go for the $40 remote display box that keeps the main unit from flashing at all.
You want to avoid flashing lights in your rear view area. Flashing blue or red lights attract attention of tail gaiters and trailing police.

Sometimes I'll play it safe on a 35 mph two lane and I'll only do 40mph only to have some dip**************** start high beaming me. I'll reboot the V1 so that dip**************** sees the sees the series of flashing lights from the main unit being rebooted(the only time it flashes when using the remote box) and he/she figures I know something they don't. They usually pass me or quit with the high beaming.