Montcalm Royal London House has earned high marks for its cleanliness, with guests frequently commenting on the well-maintained rooms and overall attention to detail, though there is a slight call for better housekeeping. The service at this hotel is often lauded for being both attentive and professional, enhancing guests' experiences through the staff's friendliness and efficiency. While the amenities, including the comfortable beds and the Aviary rooftop bar, receive consistent praise, some visitors have mentioned limited spa session times. The atmosphere is celebrated for its warmth and stylish decor, creating a welcoming environment for guests. Opinions on value are split, with some concerns over the cost of extras, yet there is an appreciation for the high-quality rooms and complimentary amenities. The rooms are generally admired for their comfort and cleanliness; however, a few guests have pointed out functional issues. The hotel's prime location is a highlight for many, offering easy access to transport and local attractions.