I have a pair on Nikon Monarch ATB 10x42 I have been using since 1998. I have compared them side by side with a $1400 pair of Leica's and they are as clear and bright. Mine have been exposed through every type of weather you can imagine and I have never had an issue. I wear eyeglasses and these bino's work great.
My friend has the same pair and he left his on the tailgate of his truck and the binoculars hit the pavement at 50 mph. Nikon replaced them with a new pair, no questions asked.
If anything happened to mine, I would buy the same pair tomorrow.