(Currently over 20 hours of playtime, having completed the main story and stuck in the post game grind)
With a myriad of problems, this interpretation of the anime leaves a lot to be desired.
Mechanically the game is all over the place.
The dungeon aspects are under developed with awkward, floaty controls.
The default control scheme is a really awkward keyboard layout that doesn't support key remapping.
The game launcher is the only place that you can adjust the gamepad settings, however it also didn't register any of my gamepad inputs so I had to use a third party utility to even get those working properly, and even then it had lead to weird results when using the analogue inputs.
During the main story the game incentivizes you to skip the combat as most of your characters aptitudes are based on story progression, with little means outside of that to actually develop in a meaningful way.
Once you hit the post game, the game becomes a poorly balanced slog as you run through increasingly scaling enemies that, even with maximized stats and equipment, still feel like a chore.
The actual Visual Novel elements are superficial, existing simply as text with mostly static png cutins being puppeted around as if glued to a stick. I would say the one saving grace is the voice acting; it's only a shame I don't know Japanese.
If you plan on getting all the achievements, just know you will end up sinking more time into that than you would actually just watching the anime over again, which, if you really like the series, would be my recommendation rather than playing this shallow interpretation.