Absolutely perfect location. Right in the old city. However, near the edge so there were real supermarkets and trams nearby. Hosts are great. Apartment was stocked with various coffee options. It was spotlessly clean. Their communication was excellent. They also provided local information and spent time with us on arrival to help orient us. The apartment itself is spacious and nicely decorated.
Also, a good benefit is the apartment is very quiet. Thick old walls and doubled windows.
The only thing to be aware of is the shower. It will be difficult to stand in it if you are over 5 feet tall - even my 11 year old had to sit. The tub is perfectly nice though. I didn't hold this against the place but just something to be aware of.