Arne & Annette are the great hosts. We were allowed an earlier check in and later check out gratis, so we didn't have to leave suitcase in the airport luggage locker and then go after them. Also Arne explained us the transport tips and routes in Copenhagen.
Cleaness is fine, all electrical appliances are working properly (as an electrician I may note the Danish standard socket with switch, so you don't need to unplug appliances, enough simply turn off switch). Also you can use tea, coffee, milk, etc. without limitation.
I strongly recommend to book accommodation with these hosts.