It's an apartment block converted into a holiday stay, so reception is only open for very limited hours and you don't get any sort of service like a normal hotel if anything is broken. There's even a house cat welcoming me when I arrived, and he was available outside receptionist's hours.
For the Grand Apartment, it is cheap for London. Location is also very convenient to discover East London which was the focus of my short stay.
If you're a light sleeper, do not stay here. I was able to hear everything from the people who came back late next door to the morning bins being collected.
The shower was pathetic, and worse, there was no internal lock on the door so I'm not surprised one reviewer said a staff entered their room by mistake.
The dining chairs and arm chairs had grey covers which look like they didn't get replaced until after several guest rotations.
Luckily I only stayed 1 night so the downsides didn't really matter by the time I left.