Even though we didn't get to meet Elena, which is probably testament to how well the unit was presented, we had a terrific stay. Days before arrival we were given email instructions on access to the fully self contained Studio and getting in couldn't have been easier. The fridge and cupboards even had a few supplies to use. Not sure if these were from Elena or left by previous guests, but they were still a nice touch and appreciated - even if we didn't use them all. The kitchen has a full oven and cook-top, as well as a microwave and the washing machine and dryer were very welcome after having spent 6 weeks travelling through Europe before we arrived. The bed was very comfortable. The shower was large enough, but the plastic shower base had a bend in the floor, which made it prone to tipping up a little if you stood near an edge, but nothing that concerned you once you'd done it for the first time and knew what to expect! :-)
The location is just perfect. A short, easy walk to either Bayswater or Queensway Tube Stations and bus stops are at the end of the street, opposite Kensington Gardens. There's 3 nice pubs and a Tesco Express and Sainsbury Local, banks and other food/services/souvenir shops all between the unit and Bayswater Tube, so mostly all your needs can be fixed within 200 metres.
We had a fantastic time in Elena's Studio and wouldn't hesitate to recommend it, or return if we find ourselves back in London.