I've played a lot of point and clicks and this one is great, but the puzzles are very tricky. Don't play it if you're impatient or adverse to using walkthroughs,
Hmm... I disagree about the puzzles. The puzzles weren't terribly difficult. I'm not saying they were easy, just not terribly difficult. Though I do agree with the patience factor. I think having patience has to do more with watching the main character walk up and down stairs, for example. I've definitely seen harder games on GOG. I haven't played the second one yet though.