I have used a lot of chains and never had any problems, but then again they were all the big name brands. Now I run the Primary Drive brand and their very good chains. I think the one I have now is the rdo oring with the side window cutouts for self cleaning. I never really thought much about how the chains looked, but this chain looks pretty cool with the cutouts in it, and I can see where it would help clean.
I have been using these chains for a while now with no problems. With my old setup I ran 2 M-links cause I screwed up and took 1 too many off when I got it, "ROOKIE" I know! Anyway it held up good but its always got you wondering.