Not too bad of a stay. Flatiron is an amazing place to stay in Manhattan as it is really the middle of Manhattan. Everything was very walkable and close distance to Fifth Avenue shopping and restaurants and Washington Square Park.
Our room at Sonder Flatiron was not too bad and did look like the photos but there was no staff for more towels or other amenities amidst the trip. We also could not check in until 4 PM the day we arrived and had to check out by 11 AM the day we left. The room felt slightly small but did the trick.