We enjoyed our stay at Sonder. The location is great (close to financial district and the Battery), Uber was always only few mins wait, subway station is also very close. It was very clean, kitchen is fully equipped, furniture simple and functional, the washer and dryer are new (Bosh). The view from our window and the roof top was amazing. There are also two launches and a music room. There are several elevators, they are very fast. Pool was not open since we stayed after Labor Day, but it looks very nice.
The front desk staff was very friendly and responsive to any request or question we had.
The only issue we had was the sleeper sofa - it's OK for kids, but it's uncomfortable for sleeping for adults. The king size bed was very comfortable. Altogether - very nice place to stay if visiting NYC.