My husband and I came to Aeroe in order to get married and stayed in the house with 5 more people, which worked well. We really enjoyed our time at Annies Hus! Karin, the caretaker, is super friendly and the house is very comfortable and well equipped, especially the kitchen. The beds were also very comfortable and we really appreciated that heating was available, as the weather was fairly cold. Due to the season, we did not book the little beach house but payed it a visit and could totally imagine that it's a great plus during the summer months!
Booking and payment was also very uncomplicated. Our only small point of critique would be the lack of closets and drawers in the sleeping rooms, as some were already full with stuff (like guitars or electronic devices) or hard to access or locked, which forced us to leave most clothes in our suitcases. For three nights that was not really a problem but it might have been for a longer stay, as living out of the suitcase is not for everyone, especially if you have 7 people with at least one suicase each.
But all in all we recommend staying at Annies Hus because the value for money is great and it's really hyggelig!