I shot that exact same kind last year. I have yet to find anything bad about them. They will help you know exactly where you hit the animal. When tuning your bow it is easier to see the arrow flight.

A few things: make sure you put the magnet as close to the arrow as possible, then try it out before glueing it on.
another thing, the brightness of the nock will dim alot if left on for a period of time. The battery is not dead. Just turn it off and it will be back to normal in an hour or so. What I'm saying is, don't leave it on in the woods after the shot hoping it will mark your arrow when you come back. It will appear to be dead.

BTW, The first deer you shoot with these things and you will wonder how you ever hunted w/out them.


good luck
RBBH