Out of 7 BTCs I have only replaced one and it was because it kept jumping date/time. It was an '09 model. Bushnell replaced it with a '10 model Bone Collector and I fell in love with the '10 model and purchased two more which have also worked great for me. I will get one or two whiteouts right about dark but nothing to lose any sleep over. Other than that, no problems to report at this time.