I printed this with PLA at 15% infill and the leg/flipper and tail joints were stiff but moved. The neck broke on my first try at gently moving anything on it. My printer is as close to calibrated as I can get it (20mm test cubes are 20.01mm and 1mm walls are 1mm). the model looks great, the eyes printed well, everything seemed to have gone well. Other than the neck joints being a bit delicate.