I stayed at Serena's place for over a month and my experience was amazing overall. She is an excellent host and was very accommodating throughout my stay. She is easily approachable and does her best to take care of any concerns that you might have!
The house itself is also very beautiful. The bedroom and bathroom are both very clean and the kitchen has all the appliances and equipment that is required on a day to day basis. The bedroom also has a workspace consisting of a wooden table and bench which is very helpful for anyone who needs a space to study or work. Heating is turned on according to a schedule but I did not find it to be an issue at any point during my stay. Hot water is available all the time.
The location is nice as well. There are a couple of cash and carry stores present at a walking distance of a few minutes in case you need to get something urgently. Bus and train stations are also present nearby if you wish to travel far.