The ending was both the best and worst part. Dreamfall: Chapters will likely be on par with The Longest Journey.
The puzzles were generally go here, return, go back, and return again. None of them were difficult nor of the same type as the first game. The game is definitely geared towards an adolescent crowd.
The fight sequences need to go and the playable Assassin character was almost unnecessary. He must be a major character in the next one.
The voice acting was very good and the music was adequate. I recall TLJ being better and having the full soundtrack included in the game. Dreamfall uses a band named Magnet and not all of the songs seem to fit as well. There might have been a better choice for USA audiences or simply going with an orchestral score the entire time may have been a better choice.
Characters were rounded, but I really missed all of the side dialogs that were a nice fun part of TLJ. I realized how important it was to have two characters interacting each other throughout the game. In TLJ, April and Crow were great together. In Dreamfall, each character is basically alone with his/her environment and it loses a lot of player immersement because of it.
But the game really shines at the end. Really, the last dialog when the game basically says, wait till next time! Makes you wonder if this game could have been the first 2 hours of the next game and not have lost any of the storyline. Now that I have a vested interest in the game series, I can't wait for the third one. Of course, TLJ was one of my favorite games and stories. Hopefully it will be released in a 2008 and a new segment every 1 year at a budget price so no one has to wait as long.
I think one of the biggest reasons why it failed to sell as much it could have was some of the unnecessary content. The game received an MA 17+ rating in the USA. It could have been easily reduced by removing unnecessary content.
Overall, it’s definitely worth playing, but you should play The Longest Journey first. You might even want to wait to on playing Dreamfall until Dreamfall: Chapters begin to be released. But the first one stands alone.