Reviews provided by RottenTomatoes
New York Times:
The movie's momentum is such that one never has much time to react to its lack of reason, only to its sensations of speed and narrow escape, and to the splendor of its crazy gadgets and decor.
Assorted ladies, a few quick lines, and one good chase, making for a mediocre entry in the series.
The ending, while high on pyrotechnics, is low on tension, bringing Connery's era to a rather dissatisfying conclusion.
We see different movies for different reasons, and Diamonds Are Forever is great at doing the things we see a James Bond movie for.
Bond looks better than ever, partly because Sean Connery has returned to play him.
Diamonds Are Forever doesn't carry the same quality or flair as its many predecessors.