I would only worry about the reviews from people who actually own one- not what someone 'thinks' would/could/might happen...
I have the 50x on my .308 Howa. It has performed flawlessly, no fogging, clear view at all ranges, and yes- very visible in bright or low light.
I'm not marketing these things or trying to make myself feel better about my purchase. I was very skeptical about it, but I figured for the price I would try it out, and return it if it was crap. I put the scope on my Howa 1500 Ranchland -which is a compact, rubber Hogue stocked rifle in .30 that has the recoil of an elephant gun. I am very happy with it, and the next scope I buy will be a Centerpoint.
I've had/have Bushnell, Nikon, and Leupolds as well.