On it's own it's a decent SRPG with okay-ish combat and a not-so-great story, but its real saving grace is how it's a dedicated love letter to the fans of the series, so if you're a fan yourself or interested enough in the series, then you might get some enjoyment of it.
Gameplay-wise it's the same as 5 with the only real change is that uses an agility-based flow instead of a phase-based one. The issue is that battles are slow and boring, map size got slightly bigger than in its predecessor, but everyone can only move only up to 3 squares so it takes a while for any sort of action to kick in, and magic is ridiculously overpowered here more than any other SN, aside from that it's passable overall.
There isn't any sort of actual overarching plot here, in a nutshell you're just collecting characters from other SNs who fell into some other world and find out what the heck is happening there, and save the world and whatnot. But the interactions between all of these characters from different times and circumstances over all sorts of topics and events from the previous games or even this one is the meat of the matter in that aspect.
And the less said about the localization (specifically the voice work), the better.

Great game, loved almost everything, the story had some issues, but i really liked Act 3
Never expected to love the gameplay, felt so satisfying, every character felt distinct playstyle-wise, and the fatal strikes and OLs made it more fun, really liked breaking the game with Rita lol
The cast oh man, so good, still love Berseria more but Vespy's is great, cuz there was a lot of interactions between them and it showed off how fleshed out the characters were, the skits were quite hilarious too. Even the antagonists were cool, Yeager especially.
The music is my favorite in the series, Sakuraba went full power with this one, has a lot of tracks that differed from his usual stuff which was a change of pace, and didn't expect them on a Tales game.
Despite the world's visuals having more of a natural aesthetic contrast to Graces' crystalline , it still managed to look beautiful, some of the dungeons and towns have really good designs which made them memorable, Zaude and Dahngrest to name a few
it's a good game, a jack-of-all-trades Tales game so to speak. prolly my 5th or 4th favorite game in the series, just overhyped a bit too much