I have their 3-9 power scope. They're fixed power Scopes and the one I have are worth every penny. These are about the only affordable scope that will actually track very accurately with the turrets, and hold zero through rifle drops and vibration and lots of high recoil shooting as long as the scope is mounted in quality rings correctly. The glass on them is not quite as good has a lot of the Scopes that design their scopes for having good glass and market them that way, but in my opinion reliability and functionality trumps the clearest glass available. With my 3-9, I can easily shoot three to six inch groups at 600 yd and that is in low light with my crappy blurry shooting eye. So, the glass is absolutely sufficient.
If you are looking for an affordable and reliable scope, do yourself a favor and get one of these. A lot of people love Leupold and vortex, but they're zero holding capability is non-existent compared to these.
The 6x and 3-9 the most reliable and affordable Scopes you can get for the distance the average Hunter will be shooting, and they are fully usable to shoot longer range out to 600 or maybe even a 1000 with the 3-9.
Good plug, Jeff!