It's pretty good, all things considered. The combat gameplay is fun, even if it feels like the hit rate on attacks is low at the beginning. The writing is good, i really like the companions you get, and their side missions are the ones i enjoyed the most, specially the hacker one. The final mission has enough variance to replay the game one or two times, or at least change up the dialogue options you choose to see what happens, i won't spoil, the overall narrative is also great, love the way they set up the final mission.

Onto the negatives. Hacking is super lame, they decided to go the megaman battle network way of dealing with the internet, but with the same combat gameplay as the flesh and bone counterpart, only differences are your stats and your buyable spells. There are no mage companions, so you'll always be missing that role in your party if you decide to go another route. Speaking of which, playing as a hacker here feels very lame, mainly because your other hacker will always be leagues better than you and get his best equipment and components and stuff for free in between missions. There's a "middle point" in the story where the main narrative kinda stops to a halt and becomes an episodic mission parade where you're just doing odd jobs for cash, stopping the pacing dead in it's tracks. Also, there are almost zero ways to resolve situations with anything other than direct violence, or the occasional dialogue that skips said combat sometimes, but not always. There are also no stealth mechanics, and in the sections that tries (emphasis on "tries") to have stealth segments, it's just regular overworld walking but with people walking in patterns, where you initiate regular combat when caught. I have other spoiler-filled complaints regarding just how little we see of our actions in the epilogue, but yeah. Also most of the art is ugly as sin, you can count the exceptions with one hand, thankfully some of them being your companions.

In conclusion, it has some flaws, but it's definitely worth at least one playthrough

Quite literally the worst gacha on the market, it's only kept afloat by raging gooners going into debt to pull from the most ghoulish coomer women designs ever concieved. But surely, there must be a redeeming factor, right?

The story and writing is trash, most of the characters feel like they're there for no reason, add nothing to the story, and it's just badly written. The Jeanne arc that serves as the introduction is a complete borefest, with edgy jeanne throwing what's basically a tantrum and forcing everyone else in it, and it only gets worse after that.

The combat, oh man, the combat. This weird, puppet-like live2d-esque sprites are the worst thing my eyes have seen. It does not look good, period. Not only that, you will suffer long loading times and bad, oversaturated visual effects (hey just life ufotable fate productions) each combat. The gameplay is also braindead skill pressing then doing some strange 3-card action combat that emulates rock-paper-scissors, only with numbers. Watching paint dry is more engaging thann this.
Character design. It's a 0/10 on most characters, only semi-salvageable ones being old designs just thrown in there for nostalgia pandering, and one or two special cases where the artist was either not a porn artist, or felt like drawing an actually appealing design that day.

The grind, as you would expect, is insanely anti-f2p, and even if you pay the grind is still insane. Most of the time you are relying on your op friend's guest servant to do the job for you, which is very lame.

This is a complain on fate as a whole, but they get the etymology on every single historical figure wrong somehow, most of the time on purpose, others because a wikipedia search just isn't enough for what they were trying to tackle. Trying to list every single one, like King Arthur, Lancelot and the french fanfiction around him and arthur's wife, every single canonized Saint (Jeanne and Martha being the worst offenders), Gilles de Rais, and countless others, would fill a book by itself.

In conclusion, it fails in every single aspect, and would've died one month after relase if it wasn't stapled to the Fate franchise.