Was given a room downstairs with a view of a wall. Also had a constant noise from a heating system or pipe throughout the night. Room was spacious though and clean with fridge, microwave and toaster. Shower on the small side I would say. 1 km walk to Paddington station is a plus as it connects to the Heathrow Express and various subway lines. Hyde Park is also quite near by.
Would give 4 stars if not for the mentioned issues with my room; so maybe avoid room 03 in the basement, if you can.