This game has Jaden/Yubel so it's a masterpiece. Jokes aside, I've spent no money at all on this game and still had a fun time for some months. I generally don't really play mobile games but I liked this one and the way they include the whole YGO! anime universe.
Also I wasn't joking, when I saw that a Jaden/Yubel event was live, I re-installed the game and cried tears of joy. Good times.