Extremely Buggy. Avoid! The latest event just ended and I was not rewarded any of the items I earned. This is just the final straw for me in a long list of bugs and glitches. Every time an event starts it forces you to sit through the event tutorial even if you've done them multiple times. The amount of in game currency you need to upgrade things is insanely high compared to how much you can get without paying. The screen is also littered with placeholder graphics.