Sometimes the running around is repeated on the same line bit annoying, which is exacerbated at very few locations: you then do not know if you've missed something where (eg in a dialog stubbornly have repeated a question). And somewhere must commute back and forth until the clear will.
The puzzles are not too hard, but a certain procedure must be adhered to. So no variable course of action, hardly at intermediate steps. The puzzles themselves are - unlike many similar games! - Easy to solve, more logical place would have been much more interesting Must Try. No game guide required, even immoderately patience.
Is me 2 times stuck (mouse was gone), so I recommend caching (otherwise unnecessary). At the 2nd start it worked both times properly. Did not use a patch.
Overall a great game, fully recommended, compared to story, graphics and especially SCOPE / ingenuity and accuracy / Zip mode etc. of Myst halt max. 3-4 star in it, I'll think me now but the acquisition of slightly worse censored 2nd part. Have fun!
I would also give 3 1/2 stars that hits it exactly.