Chicago Reader review:
While it doesn't have the soft-edged sense of wonder that the Travers books have, Walt Disney's 1964 version of the Mary Poppins story does manage to avoid the usual saccharine excesses of his live-action work. It goes without saying that the semianimated sequences work best—the chimney-sweeps number may be bastard Broadway (with the aimless athleticism rented from Michael Kidd), but the grace of the effects makes it some kind of classic. Robert Stevenson directed; with Julie Andrews and Dick Van Dyke.
Here are Mark Kermode's ten reasons to love Mary Poppins and above is the Original Scary Mary Poppins Trailer.