Exactly what is says on the advert. It suited my needs well.
The walls are a little thin, so you can sometimes hear someone walking around above you, or the people next door. It is also very easy to hear people talking in the hallway, but if you are ok with that then you shouldn't see any problems.
If you are a very light sleeper, take earplugs as you also can hear cars and vehicles occasionally going past as your window faces the street.