Pros (+) When I first arrived I was given room 204 which smelled like the sewer. I called to ask to change rooms and told them of the smell and they gave me air freshener. I ended up sleeping with my travel mates. The next day I was moved. This room was much better.
Cons (-) If a room smells of sewer it should not be rented to guests. Especially because there was no access to fresh air.