waterproof/arc/warranty all that matters. ya get what ya pay for. i got a chuck adams, dont know who he is, and i had to look and see the name..but out of all the ones i used at the store, this was the best one at the time. it has never failed me, like my $100/1000ft one would when i needed it most while bow hunting. it is great for 100 yards and more away..but bow hunting i needed feet, and accurate..fast and consistently..chuck adams does that, but it isnt good for a long way, i think 4-600 yards maybe. so the right tool fer the right job i guess.