The newest 3D printer from MBot3D, the Grid II+, features several upgrades to previous iterations. An anti-wear structure, auto-leveling print bed, filament sensor, BuildTak surface, and smart structure allow for this machine to provide an enhanced, user-friendly print experience with a lower frequency of print failures. Read more about it at 3DPrint.com: http://3dprint.com/114396/mbot-grid-11-plus-3d-printer/