W to avoid for couples ..
Hello
I stayed in W for 4 days. Nice lobby and roof top and rooms are ok.
But service is bad , too slow and not organised.
Some rooms have a view on a wall , and you can hear what s going on in the bedroom besides yours !! I think it s too expensive compare to other hotels. 
For cheeper you can go to the Madison . The location is not as good as the W , but the rest is fantastic. I stayed 1 night there.
I am a parisian french living in London .