I have used the JO from Day 1. I like it. It works fine, until it doesn't. I have owned 3. One was the newest version from Paul. While the new mount works on some bikes, it worked on neither of mine, even with modifications, so I returned it. Paul was kind enough to give me a full refund, in spite of my modifications.
While on a measurement, my co-measurer (marathon course) had his counter torque and freeze. Able to get it functional, but when will it torque again, and die? I loaned him my backup for some courses he measured.
My Unit #1 gave me nasty disparities on each leg of my calibration course, which seems to indicate internal gears shot, as it gave me approx 1000, plus and minus 200, additional counts for each leg. Unit is worthless.
My backup was loaned-out due to another JO malfunctioning. I have nothing, and my only source had a product I can't use. My business could fail, due to no counter. Fortunately, I was able to get my loaned-out counter back that day.
I have ordered a Totalizer, and will report to all how it works. Necessity is the mother of open-mindedness, to paraphrase.
When the new Super Duper Riegal Slooper is available, I will order at least one of them, also. I do over 30 courses a year, and can't afford to be without at least two counters. (I backup all my computer files, also)
Thank you, Neville, for offering an alternative product for our "profession".