We stayed for 2 nights over Christmas break. Carvi hotel was clean, had rooms in great condition and a friendly staff (many spoke Portuguese and its owner is Brazilian). The beds were very comfortable (firm) and the towels were nice and soft.
The rooms were tight by American standards, but thats was expected for the Manhattan area. Everything looked fairly new, which was great.
The front desk area was clean and had a nice modern look (as did the rooms). Even the stairs were clean, well-lit and even smelled like lemon lime cleaning product.
Its located within walking distance to all major attractions in midtown manhattan (Times Square, Empire State, etc). I parked at the garage two buildings down the street, which has partnered with the hotel. If I had more time, I would have looked for a cheaper garage, as it cost $35/night with the measly $2 discount from the hotel.
I recommend it to anyone looking for something clean, in new condition, and close to everything.