Depending on your point of view, you'll either love or hate this game. The atmosphere, the graphics and the story are just great. You feel part of something bigger. However, this comes at a price: gameplay. Dialogues are long, and often you feel like watching a movie; not playing a game. Still, I enjoyed it very much, and I'd recommend this game to anyone who likes adventures.
And PS: if the above is true for The Longest Journey, it's even more so for its sequel: Dreamfall. That's just a movie where every once in a while you have to do something - often no more than just running from a to b.