Al
The zippers unit from what I have been seeing seems to be working pretty good and eliminates the need for a dyno. Only time will tell ir there's going to be problems with the unit. I have heard of one failing already but as compared to how many units sold?
Problem as I see it is if you break down on the road, most dealers will not touch the bike because they don't understand the unit and can't diagnose using the DTC codes.