The value of his location is incredible! This is a lovely, quiet, inexpensive place to stay about a 15-minute walk (primarily through a quiet residential neighborhood) from the Tower of London/Tower Bridge and the Tower Hill Underground station. (Once you're on "the tube", you can get ANYWHERE in London quickly and economically, especially if you buy a pay-as-you-go Oyster card at the airport or any tube station.)
The location is also only about 15 minutes away from the Wapping Overground station (which takes the Oyster card). There is a bus stop a minute away. There is a WONDERFUL grocery store (Waitrose) 2 to 3 minutes away.
The location has a small kitchen with a full-sized refrigerator/freezer, microwave, dishes that guests are permitted to use, and even a small washing machine. (I did not have the opportunity to use the washing machine.) There is a comfortable living room with a TV and a good-sized dining area, but I was too busy during my stay to take advantage of these. The free WiFi was a must for me, and it was reasonably fast and reliable.
My room was large and comfortable with a good-sized bed, plenty of storage space and a desk. Since I was visiting London for business, and I had lots of work to do, I especially appreciated the desk. I have stayed in minuscule accommodations in London (and Edinburgh) before, so I was grateful for the space!
The host (Soo) was VERY thorough in her instructions and communications. She is a lovely person, and I enjoyed our email exchanges. I was sorry I didn't get to meet her in person, but I did get to meet and chat with both of her very personable children. She arranged for a housekeeper to come regularly to clean and provide fresh towels.
The *ONLY* downside of this location is that there are multiple guest rooms and only 1 shared bathroom. This would not be a problem if all guests followed Soo's very clear rules and the signs posted on the bathroom door, but one set of overnight guests did not do so for some reason, which caused me some inconvenience (for which Soo apologized). All of the other guests were fine; they were quiet and polite.
If I ever get to London again, I will take a friend, arrange to stay with Soo again, and rent both guest rooms!