Using a cobra for about 12 years now. Never had a problem with it except calipers freezing together after sliding on my ass down a hill. I didn't shake and blow the moisture off and the temps were hovering between 10-15 degrees that day. Same day our snowmobiles got vandalized 12 miles from camp. Perp cut out the plug wires and then took them to the local sherriff to report us (thought we were in an area closed to motor vehicles). Luckily we got cell signal and got some friends to come drag us out. Ya, he was sighted and lost in court and paid restitution.