They are a great sight, but they just sit too high for my liking. I've had about every high end sight made, and strongly suggest aimpoint, followed by burris and vortex for sporting uses. Vortex makes a new sight called the spitfire that looks interesting since it has an etched reticle that also illuminates. A great feature if your battery dies.
However, that said I have a fastfire3 on my turkey gun now. It's light, relatively clear and durable and reasonably priced and they have lifetime warranties now. I've said this many times, but for hunting the burris is about perfect, but if your life depends on your optic, Aimpoint all the way. Luckily turkeys dont shoot back, so the burris is fine.