Very fun. The game has a good balance with new events, frequent updates, and most importantly, a dev team that listens to the community! I do find the game laughably easy at the start of around levels 1-20 since youre handed so many good units and high power characters by just grabing a gift and getting crystals to summon units. If you want a good f2p game then this is it. The grind isn't to hard with a few exceptions, is fun with lots of characters to chose from and has a good overall gameplay.