These guys were trying to use this daily for comparison purposes, but not driving the cars the same way. The noise in the data is quite loud. I would assume other eco indicators would be more useful than just kwh, but OK, I can see I was wrong here. I can see people wanting the info when they are geeking out. I am still surprised the prius doesn't give us normal information like an engine temperature gauge that does affect performance as the car is much more efficient when warmed up. A tach with archs about effieincy zones would also have me helpful, for that normal instrumentation you need obd