Can only comment on the set-up at EasyHotel in Earls Court on Cromwell Rd.
The rooms are basic and tiny, just big enough for a double bed and some floor space. All in rooms I guess are the size of two double beds including the shower/toilet cubicle. You pay more if you want a window. There is no breakfast, we rode down to Stamford Bridge Wetherspoons which was just over a mile away via Brompton Cemetry. The room cost £40 for the night split between the two of us, so £20 each which for London suited our needs.
There is talk of one opening in Bristol which hopefully will offer stupidly cheap rooms for naughty goings-ons though I've got a Travellodge reservation for mid-march which I can cancel on the day if needs be and if I go ahead I'll pay £30, could have gone with the non-cancellation option for £22.