I went to Karin's apartment last weekend with my boyfriend. We absolutely loved the place, is super cosy and gives a real home feeling. Everything was very clean, many towels were provided and also water, supplements for making breakfast, coffee and even a bottle of wine!. She was very punctual, all the time ready to answer questions and gave us recommendations about places to go nearby.
The location is very good, you can reach the main attractions in about 10-15 min walking and there's also public transport nearby.
All in all I strongly recommend this place :)