I've used Wasp, Montecs, Thunderheads, SteelForce, and now SlickTricks. All flew well when properly tuned to the bow.
Currently the SlickTricks were shooting about 1 1/2" out of the bull, but were all grouping nicely in the same spot. A little sight adjustment and shootin' out the center consistently!
I had issues with the Montecs attempting to get them to fly straight. I couldn't get them to group consistently at all at first. A lot of messing around with the bow and arrows got them to fly right, but what a pain in the A**! They worked well, killed a deer, and an impala and a couple monkeys, when I went to Africa.
I'm not impressed with their SS one piece heads though. They don't resharpen worth a hoot, and if you get a nick or bend the point they're never the same. They were never sharp enough for my liking though. Also I had one break after making a bad shot on a deer, shot him in the spine. I know, spine shots are hard on broadheads, but testing all my new broadheads on 3/4 plywood, this is the first that broke on me. Maybe just a fluke though...
That said, replaceable blades are sooooo nice

Easy to re-sharpen!