It has it's issues, but at the core it's still TCG so it's a fun game.

My first issue is the mobile app is pretty clunky, but at least the desktop version isn't. I just wish it was easier to play on the go.

My second issue is the way you obtain cards. They have a battle pass which actually works pretty well. Like most battle passes they have a free and a premium version. The cool thing is the premium tier you can buy with the in game currency so you don't actually have to spend money on it if you don't want to. My issue is that, at least at the time of writing this, the packs of cards in the battle pass are almost all from the same set. So you end up getting a lot of the same cards, and you can only have four of one card so once you start to get more than four they get converted into one of the in game currencies. I just wish there was more variety in the cards you can obtain. You can go to the shop and buy packs from past sets all the way to the XY era but, again, you have to go out of your way and spend in game currency on it.