I have used their hour meter on my trials bike, and their temperature gauge on my Savage.

They are good quality and work well.  There is no internal light so you can read them when riding at night......but the worst bummer of all is the battery cannot be replaced and they claim they are good for 5 years.

If you buy one get it directly from TrailTech - don't buy one from a dealer or online retailer......as it might have been sitting on the shelf for a long time and you may not get your 5 years of use.