For the most part, The Secrets of Atlantis looks good. It uses that first person perspective that really helps to put you into the game. The locations and characters look pretty good, but seem just a little off. It might just be the slightly stylized visuals to give you the feeling of watching an old 1930's film, but either the colors or the appearance don't look quite right. This isn't really an issue because it doesn't take long for you to get used to the old-time feel of the game and just accept it.
Audio, on the other hand, seemed to have some issues. I found the sound to pop a lot and come through my speakers rather harshly. Thinking it was all a matter of sound levels, I went into the Options and fiddled with the various slide bars for a half hour or so, but to no avail. In the end, I just sucked it up and kept playing through the game.