Poorly maintained rooms. The maids do a great job with what they have to work with, but the carpeting needs replacing if shampooing doesn't remove the stains, the tile in the tub needs replacing or re-grouting. The slot machines are also very stingy.
On the bright side: The beds are comfortable and the staff is friendly, helpful and efficient. The rooms have a mini-fridge. Prices are reasonable. It would really take a small investment by upper management to move the rooms up one star.