The apartment was very comfortable for a young couple. It's not very noisy and it has a good location (close to the metro, which is the only transport we needed for our entire stay and good restaurants nearby). but don't expect to be cooking a lot, because you'll have to buy all ingredients (except salt) and you might be surprised at how small the pots are. Most restaurants are very affordable anyways. I also would recommend closing the curtains when you're changing or it's a particularly hot day, because the windows face the metro station and the sun.
Overall enjoyable stay, Birgit was very helpful with our transport concerns and always responded quickly.