We were at Agatas studio for 3 nights and we can really recommend it! Agata and her mother & grandmother were really nice and friendly and helped us always directly and uncomplicated.
The cooking equipment is perfect for snacks and light meals.
The description of the studio is very good, we didn't need a ticket to get into the city, we made it by foot in 20 minutes.
You should definetely try to catch the sunrise from Petrin mountain while you are there. In 10-15 minutes walk you have a great view on the city!