Mari's Place was very nice and we had a great stay in florence. You need to be very precise with your time of arrival otherwise you get charged some fee. Anyway there are very strict rules which may or may not are necessary. But otherwise our stay was great, we never met her but a friend of hers and she was very friendly and wanted to make our stay as comfortable as possible. The location of the place is also very good, not in the busy city center but in around 15 minutes walking you can get there.