I use Tracers and I LOVE them. It made a big difference on my Thanksgiving day hunt last year. I shot my deer 5 minutes before legal time ended deep in the woods on a rainy day. I never would have found that bolt otherwise. I snuck out of my blind and pulled the bolt out of the ground 10 minutes after the shot. Knowing that the buck was perfectly broadside to me and seeing the bubbly lung blood told me that I had almost definitely double-lunged him. That gave me the confidence to start looking for him right away. Unfortunately... it took a few hours to find him because it was too wet and dark to track well, but the Tracer can't do much about that!