Servers open about 30min early, unannounced, so I got it immediately. Gameplay was smooth while I played for about 8hrs last night.
Saw some rubber banding / lag while fighting the 3 world bosses, 30+ ppl around. Game feels very much like a MMO vs. Genshins single player rpg.
Graphically I have to give the nod to Genshin, which has better art direction, imo.
The caps on story and lvl progression feels very odd and will last for a week it seems. My rng luck with gacha games holds true in this as well. Hit the 80 pity on the Standard Banner (gold orbs), and got a total of 3 SSR weapons (kingx2, and crow) which kind sucks, but King is one of the weapons I wanted.
So for the next week while the caps are in place, I'll just do Story and various stuff to hit the max lvl, then explore for banner currencies. Pretty chill, imo.
You have 20 days to work on unlocking the free SSR Selector box from the pre registration event, but it seems super easy to earn the 700 points required, think I hit 325 by the end of last night. Not sure who I'll pick, probably Samir or Coco, but not in a rush.