The only drawback is the washer/dryer situation. It is located in the basement, so instead of being able to easily do a wash at the end of the day, it becomes quite a chore, going up and down the 4 flights of stairs (especially if you have to keep doing those stairs over and over because some trumpbag doesn't check on their finished wash for hours). This caveat about the washer/dryer location should be expressed clearly in the apartment description.
That being said, it is still a great place to stay. It's very centrally located, but because the bedroom is an extra flight up and there is a wonderful, noise drowning fan, we slept very well (comfy bed too!). Kitchen is basic, but workable with a krups nespresso. Decor is basic, yet the overall vibe is airy and pleasant.
As others have mentioned, the stairs are plentiful, but if that is something that you are fine with (besides, its a good way to work off all that delicious Belgian beer!), then we certainly recommend the flat and we'd likely stay again.