Great for a quick stay
I was in NYC one night for a concert and needed a place to stay that was reasonably priced on sort of short notice (finding a room for less than $250 a night with 5 weeks notice is not that easy in NYC!). Marcel was very stylish, nicely located near two subways lines, and with helpful and courteous staff. I arrived very early, before 10 am, on the day of my reservation. They did not have a room for me then but took my phone number and called me at 1.00 pm to say they had a room for me (normal check in is 3.00). Leaving my bag with the concierge on both days was not a problem and they helped me with a taxi on my way back to the airport. The neighborhood has tasty nearby options for food which I was happy about. 
My only real concern is that the room, and many of the rooms it seems, was very small. It was great for one person for one night, but if you had any significant amount of luggage or if there was more than two of you it would likely be a squeeze.