It was a lovely experience staying at Robert's. My room with ensuite bathroom met every criterion I consider indispensable to a comfortable lodging:
1. spotlessly clean, especially the bathroom and toilet
2. a hot, powerful shower
3. a comfortable bed with clean and fresh bed linen
4. clean, fresh-smelling, soft and fluffy towels (white towels are expected to be snow-white)
Okay, I admit I am a little obsessive with cleanliness. ;-)

Robert's home scored extra points for
1. its ample shelving and closet space in the guest room
2. its central location, yet unbelievably quiet
3. its quaint neighbourhood which makes a lovely urban retreat
4. its proximity (5-10 minutes on foot) to a number of eateries which offer a wide variety of cuisines: Indian, Chinese, Italian, Greek, Lebanese, in addition to classic pub food. I tried the last three, which were all nice and reasonably priced.

How can my review be complete without mentioning my host?
Robert was very quick in responding to my email and text messages, often almost instantaneously. He was hospitable, accommodating, and very helpful. He invited me to join with him when he was enjoying his red wine; he offered his Japanese guest quality Japanese green tea from Harrods; he even took care of my laundry so that I could maximise my time enjoying London. Robert was a discrete host who respected my privacy and let me have almost exclusive use of his upper floor whenever I was in the house. His house will be my first choice of accommodation if I visit London again.