I tried it, having never played a Mystery Dungeon game before. I felt the game shows it age. It seem fairly basic in terms of the gameplay and also in the level design.
Having not played the games before, I don't know if it gets a bit more developed later on in the game.
Also the art style takes a bit of getting used to. I don't hate it but it also feels a bit lacking in terms of what has been done elsewhere, even in Sword and Shield or Lets Go. It just feels a bit bland.