5/5 Gameplay - If you played Arknights, you might also want to try this game and it is much easier than Arknights too. Stamina is actually bearable if you didn't actually grind mindlessly, keep in mind you can get stamina and auto plays on shops and events and it also resets.
5/5 Graphics - It was actually good when using ultra graphics and you can actually see the efforts devs made here.
4/5 Gacha - The gacha is fine, recommended that you save your diamonds and summoning gems and using it only every FRIDAY to MONDAY (before reset) because it is when banner shows up with rate ups even on Legendary summon.
Overall, it is a challenging game made for people who are hardcore strategist gamers and to people who have patience with these type of games.