i'm not a pro like some of the other guys who are writing reviews.  This is my first time using this kind of tool, on an old cast iron dewalt radial arm saw.  this thing is incredible.  When the motor is started ,  there is a a sound like a powerful fan running but no vibration.  On a RAS, you need a shaper guard- found one on ebay fairly reasonable.  Set up  some hold-downs & hold in with feather boards- and  wow, suddenly a glass smooth milled edge on your board, no sweat.  Very impressive- expensive, but worth it.