A relatively quiet and simple movie, but in a good way that leaves the viewer with a nice, somewhat melancholic wistfulness.
The movie excellently captures the world it portrays (one summer holiday season with the owner, staff and guests of a Catskill hotel that has seen better days). As others have noted, Maureen Stapleton makes the movie worthwhile on her own, and it's a special pleasure for anyone who has an appreciation for the history of such resort hotels, and the role they played giving many entertainers a start in "the old days."
The Nat King Cole song of the same title captures in song much of what the movie captures on film.