As a noted member of the "I Stopped Playing Yu-Gi-Oh After Fusion/Ritual Cards" club, this hits me right in my nostalgic feels.

It was always just fun to have a version of the card game on the go without having to carry around decks of cards. I still enjoy it now, especially as someone who is well past the point of being able to understand how Synchros, XYZs, Pendulums and...whatever the other one is called...work.