I have the cheapest one Bushnell sells, view them as a neccessary evil, lol, and am happy w/ mine, but have not checked out the competition. I doubt it will work thru mesh, often doesn't want to work thru windshield, and can be fussy if something else is close to what you are trying to range. It does tell you when battery is low as I found out on my last trip, but had a spare. Got alot of shots out of the first battery that was in it. When I was testing the rf mount on Emax, Ishot over 1200 shots w/ one mounted w/ no rubber shock absorber like the Excal version has.