Mark is nice, the location is great, and it is ok for a short stay. I wouldn't recommend it if you need to travel alone and stay for longer time, as the room is shared and people keep going in and out, which makes it difficult to sleep through the night. I also arrived late and the room was dark and I couldn't see much; but there were more beds that in the description.
No bed sheets.
External noise from the subway or cars.
Toilets were dirty.
I would only recommend it to spend a short and cheap night as it is convinient. It would be better to book the whole room for a group of people.