Loved the place! Super clean and very close to the center, but still at a good enough distance to not be annoyed by the noise. The elevator is a bit loud, so if you wake up easily it could be a bit difficult to sleep after 8am when life starts in the building. This was solved by moving to the second bedroom and with earplugs, so it's not really an issue, especially for people with normal sleep (my friend had zero problems with the elevator noise).
Konstantinos was always very attentive and responded very fast, I would definitely come back.