I have had one of these for many years and use it mostly 3/4 pine projects (some red oak and maple also).  It handles the job it was designed for well (home use), if you try to push the machine it just won't handle it well (and you my want a stronger machine for that).  The belt sizes and disc size (along with the 1/3 hp motor) dictates the maximum stock sizes you should try to use with it.  If you want to use it to sharpen tools instead of a grinder, it will do that also.  Just be sure to remove all sawdust before you do, the metal sparks and filings could ignite inside the sander.  The sander is also pretty quiet for its type (at least quieter than the competitors) and also operates smoother.  It would be nice if Delta offered a second table as an inexpensive option.