I used the game tracker for about 10 yrs with great success. It helped me find numerous deer that may have been lost without it. Although it did cause me to miss my first 2 deer because I forgot to uncork the spool. My arrow hit about 5 yds short. Last year I had horrible luck with it. I bought a new bow and I think it was shooting too fast for the spool. The string would ball up inside of the spool and caused me to miss 2 does b/c it would knot up immediately and the arrow fell short of the deer. I took it off immediately! I spoke with another guy that told me he had the same problem. He said that he can only use a spool for one shot and then he buys a new one. I guess with the new spool the insn't room for the string to knot up. I will only use it this year during poor weather.