We choose the W Washington DC mainly on the location (across the road from the White House and within a short hop to the Mall).
The rooms are nicely set, but tiny. The bathroom is so small the sink is in the main room which is small enough in itself, but redeems itself with the large comfy bed.
The day we arrived was wet and rainy and we were offered hot apple cider, and the lobby area is a nice place to reset, but not what I would call relaxing.
The rooftop bar is raved about online, but I found it over rated. Perhaps in the summer when it's open the view might be better, but everything just looked so small.
Overall this place was great in terms of location and this alone would be enough for me to come back. The service in the hotel was friendly but poor in the roof bar. The rooms were tiny, but tasteful and comfortable and I was glad we got a good rate.