I can't tell you how much I _loved_ that accents from the voice actors were a part of it. It was the first time I truly felt like a _detective_ in a video game, stuck piecing together whatever I could from a painstaking analysis of the details in front of me.
That being said, I got stuck and brute forced my way to one or two solves, only to find out at the very end (talking to a friend who completed it) that I had missed a crucial and very helpful detail. Made it obvious that's why I was stuck trying to brute force, which was deeply unpleasant by design: the triple-match made that very tricky and only once I got the search set down a lot.
Yes, it’s worth knowing going in that if you have to guess then you’ve missed a clue. Or several.