Belmond The Cadogan vs Mandarin Oriental, London (Hyde Park)

Sixty-seven keys, and it behaves like a house with sixty-seven keys: staff learn your name by the first night, and the small gestures pile up fast. One couple mentioned an Arsenal game in passing at check-in and found official scarves waiting in their room two nights later. Another family got a teddy bear dressed on their daughter's bed and an anniversary cake they hadn't asked for. General manager Russell Pratt gets thanked by name often enough that he's clearly setting the tone rather than getting lucky once. The Chelsea location, opposite the private garden and a few minutes from Sloane Street and the Kings Road, is the other thing nobody argues with.

The catch is the base room. Deluxe rooms run small for the money, more than one guest has said the photos oversell the square footage, and one traveller was quietly rebooked from a junior suite into a standard room by a third-party booking error, only finding out the day before arrival. Book above the Deluxe category if you can. Wellness is thin too: there's no real spa program, and the gym has simply been shut during at least one recent stay with no fix offered. This is a townhouse, not a resort, and it doesn't pretend otherwise once you're standing in an empty gym.

Suite rooms are where the money is well spent: the marble-and-mosaic bathrooms get called out constantly, and Willetts' risotto and breakfast come up by name rather than as generic five-star box-ticking. One guest fought a billing dispute after a broken radiator went unfixed on night two, the sourest note in months of otherwise glowing accounts. Book a junior suite for the townhouse at its best: the marble bathrooms, Willetts downstairs, and staff who'll know your name by dinner.

Door attendants Joaquin and Graham, receptionists Hugo, Ruby and Georgi, breakfast servers Mark and Sherif, bartender Claire: these names show up because people keep singling them out, not because we're padding a list. One couple's card got declined at check-in and a receptionist talked them through it so smoothly the awkwardness never landed. The people running this hotel are the reason to book it, ahead of the building or the rate.

Room quality swings hard depending on where you land. This is a converted, listed Victorian building, and the turret rooms and park-facing Deluxes read as genuinely special, but some guests end up in interior rooms with no real window and thin connecting doors. One guest paying around £1,000 a night got moved after a noisy night into a smaller room with no view, and was offered a drink at the bar as the fix. Another was told at 1am that a couple next door were audible through the connecting wall. Push for a Hyde Park-facing Deluxe and stay away from anything near a connecting door or a lift — the gap between a good room and a bad one here is wider than the rate should allow.

Dinner by Heston Blumenthal (two Michelin stars, built on old English dishes rather than anything experimental) and The Rosebery's park-view breakfast and afternoon tea both come up as the standout meals of a London trip, and guests doing the old-world comparison keep landing here over Claridge's or the Lanesborough. Those chasing round-the-clock anticipation from day one tend to end up at the Connaught instead. Book this one for the staff, the view and the food, go in ready to fight for room category, and it earns the stay.