Mario Wonder is an absolute blast. The Wonder Seeds are a tremendous edition, and they help give each level its own spice and personality. The look of some of these levels are stunning and colourful, and you will have a hard job finding a level that doesn't bring a cool new enemy to the table.
My main complaint is the game is a little on the easy side, but I suppose I can't really fault them for that, since the game is marketed to kids afterall.
Another complaint I have is that there has been two worlds that felt too short and anti-climatic with how they ended. I especially loved the levels in World 5, so I was pretty let down with how it was one of the shortest worlds in the game.
Overall, I would say that this game deserves to sit at the same table as Super Mario Bros 3 and Super Mario World. Wonder has the variety of SMB3, and it has the exploration of SMW. I definitely recommend this game to anyone who has kids, or if you want a worthy modern take on the classics we all grew up with.
9/10