If you need a convenient and central space, this is the place. Literally few steps away from Kings Cross underground station. Check in and drop off keys easy to do. Karen and Jason are quick in their reply and super detailed in their indications!
Room clean, bathroom nice and quite big, with a tub in case you want to soak after a day in the city.
Only problem are the narrow stairs, my room was on the third floor, and getting my carry on up was quite tricky.