Gameplay is outstanding. The puzzles are hard, but you won't care because the enviroment is so great to look at. And the ending is very rewarding. Graphics are easily the best I've ever seen, even though the game is getting old. The colors are bright and exciting, and look very interesting.
Dialogue is outstading.
They used some excellent voice actors and the script is well-written. This game's music is a perfect thematic match. I'd hesitate if somebody asked me what was the greatest computer game of all times. This game is a miracle, guys. Grim Fandango has everything, and the atmosphere, that it creates, is so special, that I really believe Lucas Arts produced a genuine work of art here.