David I have found to be extremely patient and helpful with any and all queries, no matter how seemingly trivial or simple, treating them and me with total respect and utter patience. His ability to communicate clearly and effectively is the hallmark of a great teacher, especially one who is so knowledgeable but does not ‘talk down’ to those whom he is teaching, instead he shows huge understanding which means that the person he is teaching meaning me, felt able to speak openly about various issues re computing which otherwise I would have felt too embarrassed to ask for fear of being regarded as a total dunce!!! I would recommend David to anyone at any level who wishes to improve their grasp of computing and feel more confident in using computers/tablets/laptops/iPhones etc.