Fine quality, with TAA option unlike many other games with only FXAA/MSAA. The spec requirement is heavy as other demanding mobile games, so that I switched between low and medium settings on my Samsung A52s (Snapdragon 778G) to try getting smooth enough framerate (above 30 fps), still drops when in a main town. I'd recommend playing on the PC version for better experience. The game ran smoothly all the time on my Core 10700k + GTX 1660S PC with all maxed settings despite its 60 fps lock, and so is Genshin.
Don't really care, as I let the default EN voice setting, though it sounds like mostly reused VAs from Genshin.
Reuses most Genshin systems, UIs and features, but with the turn-based combat that is one of boring parts for me that seems waste of time. Even I don't really like other turn-based/tactics games, rather prefer real-time ones that don't need much timing, such as King's Raid and some AFK arena clones.
I only enjoy the storyline of old JRPGs and anime/manga. Decent gameplay and graphics of such modern AAA/indie games are meant to enjoy. Their storyline & dialogues are just a filler that's enough to skip/ignore, unless it might have clues for some quests.
No guest account, no immediate account reset/deletion (waste of emails to reroll), long tutorial/gameplay till the gacha part, painful gacha rate. There are few other games I ever played generous enough to allow tutorial skip when rerolling, selective SSR box(es)/start dash rewards, decent gacha rate & pity system.