Our a/c wasn't working properly for a few nights, but once we notified the front desk, on a Sunday morning, no less, on our evening return the situation had been rectified.
The room upgrade we received was very welcome, and the private rooftop terrace, with its table, chairs and two sunbeds, meant we could spend time in comfort in the hotel. Our room was more than adequate for a week's stay, the bed was large and very comfortable, and there was good pressure in the shower which was over the bath. The hotel is within two minutes walk of the tube station, and the area offers a good selection of eateries. We had stayed in a Fuller's hotel in West Ealing, and were very impressed with the facilities, and The Chamberlain was no exception; from the check in /out process to the first evening's turn down service, the room itself, the complementary and plentiful toiletries, and the general appearance, cleanliness, and service, everything was taken care of exceptionally well.