The apartment was clean and pretty. It's quite small, but definitely big enough for one person, especially if you're going to explore the city a lot. However, there is also enough space to prepare a meal in the kitchenette.
The elevator tends to be quite slow, but you can always take the stairs (maybe when you want to go downstairs).
The apartment is really well connected because it's extremely close to a metro stop, and from there it's easy to get everywhere quickly. If you like going for walks it's also possible to walk to some of the sights from here.
The only things that stopped me from giving a better rating are the following three issues:
1) the wifi connection was very unstable,
2) I found the mattress way too hard and painful to sleep on even though I really dislike soft mattresses,
3) the shower head was spraying water in different directions (possibly clogged).