I stayed for 5 nights at a busy time of year at United Nations which means that accommodation prices rocket. So this was much cheaper and better than many hotels. Kitchen is spacious and bathroom ok.
It would be small for 4 people unless 2 of them are young children
The main drawback is that it is at ground level so it is quite dark and you hear noise from the sidewalk. But it’s in a section of 38th which doesn’t get too much siren and traffic noise so I slept much better than I have done in other places in NYC
Easy checkin and checkout procedures and Marc always prompt in replying.