I paid almost $2K for 4 nights of stay at Marlin Canary Wharf with my mother. I previously canceled a similarly priced reservation at Leonardo Royal London Tower to book a one bedroom with living room and sofa bed at Marlin. In hindsight, I would have kept my previous reservation.
(1) The elevator was out our last 3 days, and we had to haul all our luggage from the third floor ourselves.
(2) There's no AC, and it gets hotter indoors than Londoners would admit to. You'd be lucky to get a standing fan at Marlin. We got one after asking that we alternated between the bedroom and living room.
(3) It doesn't appear that housekeeping is included in the cost or is standard, because we never had housekeeping.
(4) Sofa bed was very worn out.
(5) Canary Wharf location is great, but far from Heathrow and London's city center. We struggled to get Uber rides to and from Canary Wharf.
(6) Kitchen appliances, TV were in great working conditions. Having a washer in-room was very helpful.