I'm probably in the minority, but I preferred the 'Six of Crows' duology to the original 'Shadow and Bone' trilogy. The Grisha books feel very much like a solid, foundational YA fantasy from the early 2010s—you get the chosen one, the love triangle, the dark, brooding mentor figure. The world-building around the Fold is genuinely cool, though, and the Russian-inspired aesthetic sets it apart from a lot of pseudo-medieval European stuff.
Where it really shines is as a gateway to the wider Grishaverse. Reading it makes the events in 'Six of Crows' and 'King of Scars' hit so much harder because you understand the political landscape and the mythic weight of characters like the Darkling. The pacing in the first book drags a bit in the middle, but the last third had me flipping pages like crazy. I’d say if you’re looking for intricate, multi-POV heist plots, maybe skip straight to 'Six of Crows,' but if you want to fully appreciate the universe’s history and magic system, starting here is worth the investment. The Netflix show’s mashup of plots actually got me to go back and finish the trilogy.