David, who has been emailing me his blogs for a number of years, visited me in my home by arrangement to advise on the purchase of a replacement laptop computer, and to instruct me, and improve my skills on a number of computer activities as requested by me. He displayed a deep knowledge of his subject, and skill and patience in his instruction.
His willingness to follow up the teaching sessions through dealing with queries emailed to him has been most helpful.
I am therefore confident in recommending his services to others.