I'm not big into stealth games so I was hesitant to play this at all. I'm happy to report that the stealth barely poses any challenge. Guard AI is dumber than a sack of bricks. As long as you can make it to a hiding spot, which are plentiful, guards will be struck by sudden amnesia, completely forget to chase you and return to their posts none the wiser. I very quickly abandoned any aspirations to move sneakily and resorted to running past guards at my leisure. They lose aggro as quickly as they gain it, making the stealth element a minor inconvenience rather than a well thought through mechanic.
This is of course a huge disappointment to anyone going into this expecting a proper stealth game. There are elements that I'm sure were supposed to give more depth to the gameplay, like distracting guards by throwing sticks or making them slip on oil. But none of this ever feels necessary except for a laugh. There's even some stat upgrades you can acquire, can't say I ever noticed it having any bearing.
Aside from sneaking or knocking out rats with bottles, you'll be doing exclusively fetch quests. Exploring your surroundings is fun, but it does get tedious if you're missing one last piece for a quest and just can't find it. There is a built-in hint system provided by NPCs, but it's not specific enough imo. Some of the items are ridiculously obtuse to locate.
As for the good stuff, Ghost of a Tale positively brims with lore! The universe is dense and well written. If you ever heard of Redwall, it's basically that as a videogame. Visuals accentuate the medieval setting, there is not a lot of music but the quiet ambience fits the setting neatly.
I do recommend Ghost of a Tale for its atmosphere, though I would set my expectation low in terms of gameplay and pack some tolerance for frustration. I'm not even sure if I will play it all the way to the end but it was enjoyable while it lasted.