Terrific apartment in central Copenhagen. Despite being in a lovely old building, the apartment itself is surprisingly spacious, and everything is new and modern. There's ample room for a single person or couple, as well as plenty of space, seating, tableware, etc. for having others over. The kitchen is well equipped and has everything necessary for everyday cooking, and there's a dishwasher and washer/dryer that all make for a comfortable stay of any length.
The location is excellent, just off Strædet among many shops and restaurants. It's within walking distance of central Copenhagen's attractions, and metro, regional, and S-train stops are nearby for anything beyond that.
The host is friendly, helpful, and very quick to respond.
There are a couple things that aren't necessarily positive or negative but may help to be aware of. It's a walk-up, so be prepared for some steeper stairs as you're coming and going. And as mentioned, it's an old building—with old windows—in a lively neighborhood. The shops start preparing early in the morning and the restaurants have customers outside well into the evening. It's a great atmosphere if that's what you like, but keep in mind that you'll hear all of it.