First off, the unit works very well and I feel safer when using it. It easily paired with my Garmin 830. I don't care for the "rubber band" mounting system. Furthermore, the mounting options are limited. Not everyone has the seat post height necessary to mount the unit. My wife and I ride a tandem and have a trunk pack. it blocks the light from the unit. I had to devise my own method of mounting the unit to the rack. This is a negative because many bicycle tourists use racks and we all end up inventing our own mounting methods to get over this. Come on Garmin...a little help here! The company I bought the unit from (PlayBetter) is excellent to work with. My comments above do not in any way reflect my purchase experience with them.