I stayed at this apartment with 3 other friends for 4 nights. The location is perfect, walking distance from all touristic attractions and from bars and restaurants. The place was very clean and had good heating (this was important as it was cold outside like 2°C). There are 3 bedrooms, two of them have a window to a street that can be a bit noisy at night due to the bars downstairs but if you wear wax earplugs you will be fine. The other room with a double bed is quiet.
Just one note regarding the boiler as I think it is small for the amount of people that can stay in the flat. My recommendation to the guests is to split themselves and take showers at different times of the day otherwise the hot water will not be enough for everyone, especially if it is a group of women! :)
Generally I will recommend this place to everyone. The location is simply the perfect!