Colin was extremely responsive and helpful and we really appreciate it. Our son was traveling from North Carolina, U.S. to Oxford and stayed one night in London at Colin's place. There were a few hiccups (i.e. my son went to the wrong address) but Colin was extremely helpful and patient. I would note that bath towels were not provided--this may be a cultural thing and I am NOT complaining at all--but if you are used to staying in places where towels are provided, just be sure to bring your own.
Thanks again to Colin!