Wow, what a zoo. The line-up to get in moves quickly, but once inside all the pathways are clogged with people pushing carts overladen with discounted kitchenware. The deals are good, but William Ashley is expensive at the best of times, and so the stuff on offer isn't cheaper by any means than discount retailers. Watching all the people around you snatching up dripless umbrellas and silicone cutting boards makes it hard to resist the hype, though--don't go unless you're willing to accept that you might spend a bundle!
P.S. Heads up, you'll have to pay $5 for parking unless you're willing to leave your car a kilometre from the sale.