This is a fantastic place to stay. It's right in the heart of an amazing district, and close to cafes, shopping, the river, etc.
It is small. You need to understand that "small" might not mean what you think it does. It is very small, as is common in many parts of Europe. For example, if both myself and my wife had out luggage open at the same time, there was almost no room to walk.
That being said, for the money, I think it was a very good decision for us. If you have 2 people, good idea. 2 adults and a kid, maybe. 3 adults, probably not a good call.