if anyone will admit to using one, what's the good and the bad, how are they for $200.00? what are you using it on, for how long? clarity? repeatability? can you get a full 25X out of them? other? i know it's not a leopold, nikon, nightforce or uso, but honestly for what they are what's the deal? thinking about putting one on a rimfire, adjusting between 50 and 300 yards frequently.