It was very easy to check in to the apartment. It's about 25 steps up to the apartment. The apartment is filled with the owner's belongings and you are just using it during the times they are gone (so no room to hang anything up in closets). We did not cook or make coffee but the kitchen seemed to be fully stocked. I wasn't sure how to make the coffee but probably could have figured it out.
The master bed was super comfortable but the pillows were feather so I woke up with neckaches. 1 pillow per person. In July, sun goes down at 11pm and rises before 5:30am. We had room darkening curtains in the master so that was nice. The room my 8 y/o daughter slept in had a futon which seemed to be comfortable and was made up for us before arrival which was greatly appreciated. I REALLY wish that room had room darkening curtains as well so she could have gotten better sleep. She did have a lovely view of a courtyard though.
The bathroom is a very, very tiny shower, small sink and toilet all in one little space. I had read in a review that the shower was small but I still did not imagine it being that small. My daughter did not want to shower in it. Lol
As far as location, it wasn't too bad. It's a good 12 minute walk with luggage to the metro all the way down underground, maybe a bit longer. You can walk to some main sights within 15 minutes. There is a little grocery super close as well as a wonderful bakery and breakfast cafe. Pizzeria la Fiorita had amazing pizza and was the cheapest meal we had. Foodies should definitely go to Torvehallerne. We went every day, so good but very expensive. Uma is around the corner with all you can eat sushi but we ran out of time and didn't get to eat there.
Also, if you have children, make a trip out to the Experimentarium. Best thing by far for kids in Copenhagen. My daughter loved it more than Tivoli.