I stayed at Dagmara’s home for 3 nights in the height of summer. It was perfect: very central (10 min walk to Piazza Maggiore), close to the train station and the aeroport bus (5 mins), very clean with a good bathroom and bed, and also very private. I only saw Dagmara once or twice, and entering through her home was no problem at all. She was very accommodating, and I would definitely stay here again.
Highly recommend! :)