As fas as for programming, KO VIS 2000 is the most advance speedo..

Also, Keyence is not the smallest, in fact, it is still considered big in my opinion. But in case to all of you whom have not noticed, somehow (honestly don't know why), Vzero Extreme will not burn your brush and comm after few more runs compared to any other speedo with the same gearing on the car. This what makes it a really really great speedo..

About no/verry little teamdriver using it (no offense to anyone), I guess when you make the best, you should not worry people not buying it. Samething happened to Protrak charger.