1. gacha very generous. they give 10 free rolls every single day. game also give so much gem to summon alongside blue ticket. also theres a pity summon for rate up.
2. unit is not limited to ssr meta slave. even sr still usable for long term
3. good graphic. not cibi or deformed like many jp games.
4. easy on spec. using oneplus 3t 4years old phone. only 175k antutu score. very smooth gameplay in medium.
5. waifu, gooe storyline, gameplay is unique, not just mere powercreeping, very very good design for characters, put general japanese gacha game to shame.
5/5 score. i give more if you ask me