I have been using the 4.5 quart Classic mixer, and when this went on special price, I had to get it.  I wanted a larger capacity bowl and something other than the tilt head.  

The first one had some electrical issues, which the manufacturer replaced and I'm really enjoying the second one.  This mixer really makes my bread baking easier and I'm becoming a better baker!  Thank you Kitchen Aid! [This review was collected as part of a promotion.]