Me and my other half loved staying with Zehra; the bed was comfy and we were close to a tube allowing us to visit wherever we wished in London without copious planning. The value was nigh-on unbeatable!
Our only criticisms would be that the shower was not the best and that initially the trains do seem rather loud, but you do get used to them very quickly. We did have some peanut butter, jam, bread and bananas seemingly disappear, only to reappear the next day mostly depleted. If you do bring snack food with you, maybe keep it in your room as other guests may help themselves to it. A lock on the door would also have been nice.