I stayed for three weeks and felt very safe during my time here. The bathrooms are shared space, but all the bedrooms have individual locks on the doors and the apartment itself is locked from the front door. There are 2 bathrooms between 4 bedrooms, which could get crowded in the morning and evening, but I had no unexpected troubles. The bedroom itself was very spacious and comfortable.
The location is what made me choose to stay here and I was not disappointed. It was a short walk to Charles Bridge, old town square, and being right on the river was beautiful.