We went to the Brown because we know they have a good reputation. And yes the common space is really nice - the rooftop was cool, the backyard lobby, the fact that you could drink tea / coffee for free and have cookies.
But overall , our room for 250 Euro a night, was not worth. You have NO SPACE to even lay down one luggage. And we are a couple , so we had two luggages and it was just nerv-breaking! It drove us crazy not beeing able to walk in this room. You had to walk over the bed .. just horrible. It was the opposite of relaxing and the rooms are just SO dark, it makes look everything even smaller.