Great stay at Marine's place. Super easy and flexible check-in and out times. Flat as depicted on pictures. Ideally located, about 15-20 mins walk to every major attraction; we didn't have to use the public transit once.
My only tip is that for those who have mobility issues, maybe reconsider as it is located on the 5th floor with no elevator.
Also another reviewer mentioned it was a smoker's apartment. Being non-smokers, this was not an issue with us as the place didn't smell heavily of it and had large windows to aerate. However my jacket did end up smelling a bit like smoke after 3 days of being hung out, so if you are overly sensitive to smoke, but also reconsider.
But overall, great stay, would recommend!