This is a pretty highly paced heist movie with lots of surprises. Maybe there are too many. Still, the acting is pretty good. The plot to steal a bunch of diamonds moves toward its natural end, with more than a few people interested in their location. Lee Van Cleef, whose name I know, but can't remember why, is the sober master safe cracker who is enlisted to do the heist. His associates are all greedy and no one can be trusted. He knows this and even when danger is around every corner, he seems to get there first. There are several good action sequences. The role played by Karen Black (whom I never could stand) is pretty dynamic. Unfortunately for her character, there is little motivation other than what is finally revealed, so it's all part of a grand plan. If you don't expect too much, this will keep you engaged.