I played the I-pad version a couple of times.
Thought the story was good and actually fits into the Kai series really well (between Books 3&4) in terms of setting up Haakon as "the next Darklord threat" after Zagarna.
Also has a couple of interesting side characters and ideas that set up part of the late Magnakai series technology the Darklords have.
It let's you play as a Lone Wolf struggling to come to terms with being part of the nobility, so is a nice progression ready for Book 4 when you actually command Rangers.
Music is nice and Joe Dever narrates the introduction, which is great.
However I found it was quite combat heavy, especially towards the end, and not sure how well the combat controls will translate to the Switch (controls were QTE based touch screen - you select attacks, or Kai disciplines, then need to pass a QTE to execute successfully).
Puzzle controls (lock picking and some cube manipulation puzzles) worked much better.
I'd easily recommend if it was a traditional Lone Wolf game book because I did enjoy the story a lot - but that's not really what this is (although the story is experienced by reading a book and making choices).
If it's going cheap it's probably worth getting and running through the story on easy, but the challenge of the game comes from winning tough combats rather than choices you make in the story - I could see poor controls could easily make it too frustrating to finish.
So overall it probably comes down to the price you're willing to pay for a game where combat is by far the weakest part, but is also the main focus of the game (which is a shame, because all of the out of combat stuff - dialogue choices, moving around the maps, puzzles, equipment crafting, meditation and Kai discipline use, worked really well - if the combat encounters numbered similar to the gamebooks I'd overlook the flaw, but as it is the combats feel like it takes up at least half your playtime, and it's simply not strong enough to justify anything like full price).