Made it to level 45, but honestly---it's gotten too annoying to tier up/star up characters. Lowered drop rates, plus some items removed altogether from the exchanges: no thanks. And in terms of arena points, all the run-of-the-mill Frozen teams make progression there impossible. (I'm sure Frozen is a huge money-maker, but it certainly robs the game of interest.) The game was fun until I started getting to tier 5/star 5 characters, though. However, I'm not willing to spend a bunch of money to make progress, and working towards tier 6 with the significant energy cost thrown in (20 points for an elite battle when you only get 140ish in the first place...is that really necessary?) is just annoying/wasted time.