The Nine West outlet on Clark near Diversey is closed, but the one at Halsted near Dickens is open. This review is based on the shuttered Clark Street store, and it was good. All the shoes were at least 1/3 off of retail, with prices ranging from $19.99 to $69.99 (and most seemed to be $29.99). Plus, the store was running a buy one pair, get the second for 50% off promotion, so you could save even more.
All in all, it was a great store, and worth the trip. Keep in mind that Lincoln Park can be insane, though, especially if you need to find parking on a weekend.
Nine West Outlet Store
2058 N. Halsted Street