Scopley took a game with so much promise and turned it into a paywall nightmare with many options being exclusively pay to win. The first 15 levels are pretty easy to progress but once you get above lvl 20 content really dries up beyond grinding for mats unless you are willing to drain a bank account or two. The evaluate they store packs almost exclusively at the hundred dollar price points with nothing under 20 and the 20 packs are so rare they may as well be mythical. Definitely not worth it.