I do have to throw in here, and no insult to Poser intended: I don't know if you are intending to sketch, paint, or draw in the classical sense. For that, I'd say Poser is fine as a hi-tech version of the old wooden artist's mannequin. For silhouette, foreshortening, proportions it can be helpful. However, Poser musculature and skeletal structure is "painted on" and does not move under the skin the way it does on a real human. It will not substitute for study of real anatomy, photographs, life models. It is particularly misleading about the joints. I am far too aware that there is a current crop of artists who have no understanding of and no interest in human anatomy and they seem to be getting work just fine. So this caveat may be meaningless to you. And the surface forms of the trunk are good enough to get you through most subjects -- plus, adding the cloth engine of Poser5 gives you an ability to generate nearly-real drapery folds that will help greatly in working out realistic cloth in your art. Just my two yen.