Ag I have a few if those and their quality is terrible. GW plastics are much better.
I have a bunch of bones miniatures and the quality is typically really good detail wise. Usually I judge a models details by looking at the face and seeing if its all smushed. or some finer detail lines on the figure to see if they have definition.
If you are complaining because a spear is bent then ya ok, the material is very bendy so strait stuff doesn't do so well. ....but there are easy model tricks to correct that.
What I care about mostly is if I can paint the eyes.