I'M DONE! IT'S OVER! 🎉
So, here it is...
honestly, the story is pretty good: it has its Sherlock Holmes moments, which are pretty great. It's just way too long for the story it is... it could have lasted less than half the pages and still be a good book.
I somehow got the impression that Guglielmo da Baskerville was sort of an alias for Eco himself, showing off how much the author was cultured. I might be wrong, but that's how I felt.