My wife is Gwen Chan Burton, author of "New Worlds for the Deaf" ( a history of the Lakeside School for the Deaf, as it was then known, in Jocotepec in the 1980s). She was director of the school for many years and has worked with hearing aids for more than forty years. It is not at all unusual for audiologists operating their own clinics to have a close association with a particular brand. Oticon, based in Denmark, is one of the world's top brands in terms of research, manufacturing, quality and reliability. Quite rightly, Dr Flores - who by the way speaks fluent English - is completely up front in his advertising about the brand he works with, unlike many of his competitors. If you do decide to see Dr. Flores, please report back how it goes.