Just in regards to my stay, I booked Qyum's flat just off Queen's Gate for a week-long trip to London together with my girlfriend.
To summarise - this property is fantastic and I would highly recommend it. First of all in terms of location, the flat is only a short walk away from Gloucester Road and South Kensington Station. There is a large Waitrose and a Tesco nearby should you wish to go grocery shopping - otherwise a whole array of restaurants await (and Knightsbridge is also only a short walk away). We were greeted by the host's brother during the check-in process as the host himself couldn't make it, however he was extremely helpful and polite - all communication with the host was responded to instantaneously and Qyum had even kindly procured chocolates and other amenities for us prior to our stay. Taking into account the location of the property, quality of accommodation (the description of the flat and pictures are highly accurate), the amenities available within the flat, attentiveness of the host and value for money (for an upscale residence) - I would highly recommend this property.
Thank you Qyum for being an excellent host and we look forward to staying at your flat again in the future.