I ordered a Simmons Varmint 6.5-20x40 from Cabelas a few years ago, it was fine on the lower powers, but anything above about 10-12x it progressively got more cloudy, I returned it and bought a Mueller Eraticator from Eabco which at the time was $180 or so, more money, but a lot better scope. I've got several Philippine made Simmons scopes which is where the WTC18 is made, but I've not been impressed with any of their Chinese made optics so far, except maybe the 2.5x20 shotgun scope which is only $20.
Tim