Erika is super uncomplicated. No special rules for us during our stay, no curfew, no nothing. She's also really nice and apparently had a guest until a few hours before we came and still managed to get the room ready and clean. We also didn't have the feeling we couldn't just ask for something.
The bed on the pic is comfy, the 2nd mattress slightly less comfy but ok and sits on a frame that can be lifted to the height of the bed. Definitely enough pillows and blankets. The kitchen, bathroom and toilet are pretty small but nothing you can complain about for that price and London in general.