I had to stay with jack and carlotta with a day's notice for a weekend as I had no accommodation. These two were kind enough to take me in which was great. The room is cosy and clean.
The room is great, but the flat is up a few flights of stairs. So be careful if you have luggage with you :)
As for jack and carlotta, they are amazing and so easy to get along with! This room is great for any young travellers :)