I was looking into buying one too, but stopped after I realized that I'd need to get battery-powered lighting units to make this usable at my indoor range. That's extra $$ for lighting plus having to rig a 12VDC/120VAC converter, so I stopped.
However, I did get the impression from searching many forums that the Chrony can be troublesome. The one recommended more often as both accurate & reliable unit was ProChrono Digital by Competition Electronics.
Where can I get a CED? Who sells them? I am from Sask.
Thanks