Sewage, it smelled like sewage the whole time. We had the windows open all day (during a time that the weather was cool and breeze should have aired it out), but it still smelled like sewage. There are air fresheners all over the house that try to cover up the smell, but it just creates a concoction of competing unpleasant smells...
Then there was the pack-n-play. Instead of having a mattress, they used a wood board. A wood board for a baby to sleep on!?! It looks like instead of replacing the pack-n-play's mattress they simply inserted a wood board. We wrapped it in a blanket to try to make it more comfortable, but my daughter would still wake through the night.
Then there was the staircase. It's one thing that's it's incredibly narrow, but there's paint coming off the walls throughout so you end up having paint dust all over you when you enter or exit the place.
Other than that, the location is great and the place is mostly as described.