Poser 2 people = vertices outside of the mesh.
Poser 4 People = welding problems head/neck, hands and feet.
Poser 8 People = welding problems on the back side of the head/neck.

Just to name a few of the more obvious ones.

When I say something, I can prove it.

Ugly faces and wrong breasts are open to subjectivity. I agree

Mesh errors are not open for discussion.
They are errors.

Genesis having serious uv map issues between her collars and her arms.

Need more proof?

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!