Apartment is on excellent location, it’s nice and clean.
For 4 persons it is a bit small - we stayed there as family of four, and when you turn the common/living/kitchen space into a second bedroom, it all gets a bit too tight.
There is only one window in a bedroom, a not a single one in common space, it is a bit dark and adds to a tight feeling.
If it’s only a place to sleep while exploring the city (especially if it’s only 2 persons) - it’s perfect. But if you plan to spend some time inside, it may not be the best solution.