I think that to say that the Williamsburg Pottery Outlet is one of the largest outlets anywhere is the best thing you can say about it. It's certainly not one of the cleanest or most aesthetically pleasing. The quality of the stores there has also declined dramatically as the Prime Outlets have swelled to the bloated smorgasbord of fashionable factory stores that it is today. The Pottery Factory definitely has character; it's like the redneck country cousin of the Prime Outlets. My wife hates it but I occasionally enjoy a trip out there.
However, if you go to the Pottery Factory, make sure that on your way you stop at the Wythe chocolate outlet on Route 60. It's owned by the same people who own the Wythe candy store on DoG street in Colonial Williamsburg but everything is cheaper (sometimes they have really good sales too). If you don't know what the Wythe candy store in CW is, you will when you visit DoG street. As soon as someone opens the door you can smell the chocolate.