My sister and I had a great stay at Christine's flat. Check-in was very easy: We called Christine shortly before our arrival and she showed us everything. If you have any questions you can always call her.
The bathroom is an en suite bathroom, only accessible from our room. Everything was clean and there were a lot of extras (e.g. a mini fridge, electric kettle, hair dryer and even two socket adapters).
The bus stop Pixley Street is just around the corner. You can take the bus to the tube station Mile End or the DLR station Westferry (~ 5 min each) or just walk there (~12-15 min).
There are a Lidl and a tesco nearby, as well as several restaurants.
Overall we had a great time in London and would definitely stay at Christine's flat again.