The Pro-50 is a great buy for $50 if you want the big 50mm optics. At 2.5x, you have a big 3/4" beam of light coming out the back of the scope. Too bad your eye can't open up far enough to receive all the light. If you want to use it at 7x or above at dusk, the big lens will help.
I had 8 or ten of these things a few years ago, all were optically fine. The ones I had were made in the same Phillipine factory as the Whitetail Classic and 44mag. Only one had ring dents, but most of them showed marks where the rings had been.