Bartlett and Robertson were often praised for their unity of thought and execution. At their first appearance in Montreal in 1936, a reviewer for the Montreal Gazette expressed it thus: "The playing of Bartlett and Robertson is unique in that one thinks while hearing them, not of two people at two pianos, but of four hands at a double keyboard controlled by a single mind". A reviewer of their 1936 recital at the Orpheum Theatre in New York wrote:
