I'm pretty sure everything that should be said has been said about this belt sander.  I worked with the PC "locomotive" belt sander for years and that is a fantastic tool for heavy duty, continuous surface sanding.  However, if you are looking for "medium range" belt sander (not too heavy, not too light) and versatile (can sand large surfaces, but is also capable of fine control for things like sanding the joints of frame and panel doors) this is the sander for you.  I find this model versatile enough for all purposes even to use one handed for scribing panels, trim and moulding on site.  The DeWalt variable speed 3 x 21 is too heavy for one-handed use, and the super light plastic belt sanders made by DeWalt, Makita and Black & Decker are worth avoiding.