The default figures include several pre-dressed models that can't be undressed no matter how hard you try. (The clothing is intrinsic to the figure.) As L.D. says, you can delete the nudes and still have several default humans available. And there's a whole lot in the Poser world besides humans. Animals, cartoon figures, and plenty of furniture and scenery. As for bugginess, Poser is large enough to have plenty of oddities and bugs, but it's also relatively easy to start with. Especially if you stick with the pre-dressed figures; the trickiest part for most folks is making various clothes fit properly on the nude figures.

My python page
My ShareCG freebies