Is this the best budget accommodation in København? - Probably. The flat is situated in beautiful neigborhood with shop and public transport nearby. Carsten is a welcoming host and great guy and if you want he can tell you a lot about danish history and give you good tips what to visit in the city. Sure, you share the flat with him but there was no problem or collision using it. The access to the bathroom mentioned in other reviews is not a problem at all - not even in the middle of the night. The only downside might be the bed in case you are tall (over 190 cm) - the bed itself is fine and comfortable even but it is situated between two walls so tall people might have a hard time to fit comfortably. In conclusion, I really doubt you can get a better accommodation in given price range in Copenhagen.