Well, on the most of the releases, pretty much every single piece is separate and molded in color, eyes and chin bits included. Snapped they look OK... they'll still look really toy-like bc/ the colors will be really plasticy... if you spray them with a matte-finish or something after building them they'll look a little better, but you'll still have like sprue marks and such... they'll look like really clean action figures, not showcase models. Without any paint they are just kinda bland looking.
Again, hit up dalong.net for pics of every MG, PG, HGUC, and other modern like releases...