Jjj is an amazing and kind host, I would definitely recommend him.
I was staying at his place with two friends and he was so welcoming and hospitable! He even prepared melon and some snacks and once cooked a delicious spaghetti for us.
Our room was perfectly clean and comfortable, the rest of the flat was tidy as well. We rented bikes from Jjj (he repaired or helped with everything we needed), while the price was also nice, lower than any normal bikerent.
If I visit Copenhagen in the future I would love to stay at Jjj's again :)!