I have used them and I likedit very much. If you do a search on foxfire you will most likely find my post about it. The bigger thumb wheels will loosen up unless you tighten them with some sort of small rod (allen wrench) but the individual pins stay put by just finger tightening them. I did switch to a Tru-Glo sight however andfor two reasons: 1, I like the Tritium pin the Tru-Glow sights have and 2. The Foxfire seemed to be a little fragile, now it never broke mind you I just didn't trust it "in the field". It's very verylight and small and maybe that's why I didn't trust it. I like light sights but want them to be beefy in the critical areas, (arm to sight window area) The Tru-Glo sights on the other hand are like tanks (all metal design ones) yet are still fairly light and can be had for about the same amount of money.

The Foxfire sightedin great and shot very well for me. I have since set it up on my third bow, my backup's backup if you will. Maybe one day I will put it on one of my hunting bows and give it a try in the field.....maybe.