I'm a little late posting this, but since my J. Crew Warehouse posts are some of the most popular ones, I thought I would share it.
The J. Crew Warehouse is NOT the same thing as the outlet. The outlet carries lower-quality stuff than the stores. The Warehouse has a mix of catalog/store items and outlet items. If you know your tags (outlet items usually have stars on the tag), you can walk away from these sales with incredible deals.