I have recently installed a unit on an outboard motor utilizing the bluetooth control only. The guy uses it to trim his motor angle and find the perfect cruising speed looking at the L/Hour readout (or gallon if you're keen) from his fuel injected outboard motor.
Install was a snap and it worked flawlessly.
Also I have updated the info page on my website, let me know if I'm missing anything.
Glengineering Services - MPGuino
Cheers all