I have been a guest at the St. James Court Hotel multiple times. Each time I come back the noise level seems to be worse than the time before. Crying babies, intimate noise from the room next door, street noise. Maybe I've been lucky in the rooms I had in the past but not so this past visit.
Love the location, within walking distance from the Green Park underground station for convenience when arriving from Heathrow. Close to St. James & Victoria stations - easy to get around to all the tourist sites.
Easy walk to the Parliment Buildings, Big Ben, the London Eye, easy to get to the Thames Riverwalk.
Does the great location make up for the noise factor? That is for individuals to decide.