This is great as it has a "key" of the main animals and plants around the edge with their names, sizes and when they were alive. Kids can learn a bit about the dinosaurs from that, but also use it to find the dinosaurs in the picture once they've put it together.
There's a lot going on in the picture, too, so you can spend time talking about which dinos are vegetarian and which meat-eating, etc.
The colours are bright and attractive (although you might have to explain that no-one knows what colours these animals were).
My only suggestion would be that there could be a booklet or something included to give more information on each species, or even a separate book linked to the puzzle (that Amazon could do a deal on if you bought both!).