I used one on a 5300 mile trip last fall and found its many functions extremely useful. The speedometer, mpg, temperature and fuel remaining settings kept me fully apprised of what was happening.
I ran the cable from under the seat to the front by popping it down between the top of the bearclaw and the tank. I attached a couple of rare-earth magnets to the top of the unit and stuck it to the windshield frame. Easy to attach in the morning and remove at night.