Apartment was a great choice, it was super clean, had everything we need and very big. Nina is a great host, she helped us when we have any questions and need for reco, welcomed us with small pastries etc. as curtesy, check-in and check-out was also very convenient.
Apartment is located 15-18 mins away from the center and old town by walking as stated, just keep in mind taxis are rare find so it might mean you need to walk at night coming back. All in all 5/5, would definitely recommend