Terkel's apartment is cozy and great for a short stay. The apartment was clean and comfortable. It is on the fourth floor, and there is no elevator, so be aware if you have heavy luggage. The shower is also a bit tricky, as it is a fairly cramped space, and the sensitivity of the shower nozzles and how long it takes to actually process, make it a little tough to get a comfortable temperature.
Other than that, it's a cool place in a cool neighborhood. There's a great gelato place literally a few steps away, and the metro stop is a hop away. Would highly recommend for solo travelers needing a short stint.