I\’m on my 3rd Competition Electronics chrono. The first one I purchased in 1988. Then one day about 7 or 8 years ago it just didn\’t work. I sent it back and they replaced it with a newer version for a minimal replacement fee. It worked fine, until my house fire 2 years ago. The insurance money bought me a new, Blue Tooth capable model. I also use their shot timers. In my experience, they\’re a stand up company that stands behind their products. Like RMR. One of my personal laws is, don\’t shoot your chronograph.