Here's why I chose Master and if it met my expectations:
Air Con - excellent cooling
Wifi - great connection
TV - despite what I read, they had BBC and cable, not just streamig
Room size - big for London, esp after a cruise ship cabin
Laundry - free and on each floor
Kitchen - Adequate, however no instructions for use of 3 appliances! No words, just symbols. Whatsapp sent 5s video
Shower: VG, the scent of body wash and hair, geared to men
Location - 2 min walk to Tube and Rail Stns (lower traffic than most)
Grocery - Sainsbury 2 min walk open til 11, Tesco 5mins
Coffee - 5 locations 2-3 min walk (no cream in any of them tho)
Staff- helpful on arrival at 3pm, but we missed 1/2 the day waiting
Bed: Biggest problem, only a Double Bed, and they put a Queen mattress-top on it, and we kind kept rolling down the sides like a roof top Did not have comfortable sleeps. All other Master beds seem to be Queen, so why not here?
Lastly, remember this is M-F Financial District, so many eateries close on Sat and Sun... but you have Grocery and its only 5-10 min walk to Big Tourist areas like St. Paul's and The Tower, all operating.
Overall, 9/10 and would def stay here again, tho it was pricey.