It seems like some people are having trouble figuring out how to use the buckle, but honestly it isn't that difficult.
And I've seen some comments about the buckle being made out of plastic - I get that it makes the belt feel cheap, but it looks unlikely to break.
However, since latching the buckle requires applying  pressure to lock it (you are basically pushing the buckle serrations into the belt material to hold it) this might not be a good choice for someone with hand strength/arthritis issues.