I didn't keep my demo unit for very long, but since 10x30 isn't a popular format I'll offer my 2c. I thought it was optically excellent, though I didn't have a chance to test glare/flare. There are false pupils but they don't seem to be a problem. Mechanically, I found it unacceptable. The hinge was loose and the focuser stiff, so the IPD kept changing every time I tried to focus. There was also something wrong with the diopter so it also kept needing readjustment after the focus was changed. If you get one, be sure to check for such problems... and be aware that they may develop with use.