Im currently a 3rd-year undergraduate student studying human osteology, and I was very disappointed by this app. The artwork lacks detail, and looks almost cartoonish. The radial tuberosity only appears as a small, smooth bump, and features like the deltoid tuberosity, or the oblique lines of the scapula are almost invisible if labels are turned off. It also lacks certain important landmarks, like the radial sulcus on the humerus, or the suprameatal crest on the temporal bone. On top of all that, rotating individual bones is frustrating at best.
The only thing I can say is, if the artwork improves, this would be a pretty good app! And I would feel better about losing $24...