Emma's place is cute and a convenient walk to Sloane Square tube station. However, it is not big enough for two adults and the bed is miserable. I understand the weather was unseasonably warm, so it's not her fault that the room was too hot and couldn't be cooled.
Do not miss your check-in time, it's a long walk (20 minutes dragging a suitcase) to the mini market where you'll have to pick up the key.
The room was clean and the toiletries were great, and there was enough hot water for our showers.