I have 3 or 4 of the 2-7's and like them. Have never had a problem with any, I think the biggest caliber I have put them on was a 375 Win.
I had a 1-4x I think it was and returned it. It looked an awful lot like a Tasco scope and had a hole drilled in the turret with a plug that was marked Nitrogen fill hole. T/C told me that they have several Asian manufactures that produce their scopes. I know the 1-4 was not near the quality glass that the 2-7 is.