There will always be some with issues. Just part of mass production. But it's not a large percentage. I have two, plus two more coming from sideshow. And I know a few people with them. Throw in the dozen or two that have posted here. So north of 20 figures and no issues except a couple minor paint issues. And if you buy through an authorized dealer you can always return it, and if you go through sideshows network you can get replacement parts or a whole figure of there's an issue.
It's why i would always recommend sideshow. Even if it's a bit more money. (Unless it's crazy higher then another place then I get it). With sideshow if your arm or a leg or the torso have any real issue they are great with customer service. Send a replacement type things.