As stated in the reviews before the apartment is really really noisy. I am a deep sleeper but when someone showered in the bathroom in the morning or went to toilet at night I did wake up. Since the room has no window the air in the room can get quite bad. Because of that I would not recommend staying longer than 1-2 nights.
Check in and check out was very easy.
The apartment could use some fixing in some places. For example during our stay the dishwasher was not functional and also the cooking was shattered in one corner. Besides that the kitchen was quite nice. Bathrooms were also nice.