We were 5 individuals from Denmark staying in the apartment for 4 nights. It is narrow and tall, so if you have problems with stairs, this is not for you. The reward is on the top, with a nice rooftop terrace whare you could sit all day. The street is moderate noisy but definitely not a problem. There are several good restaurants within very short distance.
It would by unfair to say anything but positive things about this apartment, the landlord and the area. I would definitely go back, when I have the option.
Price versus quality? Well, the flat is pricy, but it is worth the extra Euros. Best recommendations from me.