I have one of the 9.0 models on the stoker position of my tandem. In addition to what has already been mentioned, I'd add that the wiring is much more durable than is typical for bike computers, the wiring is available in various different lengths, the design and build quality is outstanding, and the user interface is the best on the market. My wife vastly prefers her Planet Bike 9 over the Avocet she had previously. Planet Bike recently upgraded the design of their temperature gauge--the pick up is now somewhat better isolated. But it still will reflect the relatively large differences between being in the shadows and in direct sunlight, reflected heat off the road etc. It's accurate--you simply need to take into account the wide variance in recorded temperatures of a moving object out on a road.