i like the idea of being able to mount the device on the boom. one drawback is that it needs to be read on both tacks. i use a garmin foretrex 201 strapped to the boom. When i tack i swivel it around and read it upside down. i suppose i could get 2 but that starts getting a bit expensive. ideally i would love to have a flexible LCD screen attached to both sides of the sail! wouldn't that be cool???