I am really happy with them so far. I had been using the lumenok for a couple years and I was happy with them most of the time but sometimes I would get some erratic arrow flight.

Thought I would try something else. The tracers seem great. No change in arrow flight, bright and easy to use. I love the magnet feature. So simple.

There are several good ones out there from the sound of it but i have only used these two.