My 4-year-old grandson loves it. He's already put it together multiple times (including face down!). He's constantly comparing it to the North America puzzle and his globe. I suspect the remaining ones will be following. He's a sponge for geography, and these puzzles absolutely fill the bill!
If there's a fault with this one and the World puzzle, it's that the bottom pieces do not interlock in the center, making it easy for the puzzle to be "split" unnaturally.