It's very interesting but if you don't like it now you won't like it later.
I disagree with this. The way Valve structures games, the first levels and parts of games are more tutorials and teaching game mechanics than the actual game. They usually ratchet up the difficulty and interest after that and it becomes more enjoyable.
Also, the enjoyment will be diminished if you never played Portal 1. And if you never played Portal 1, WHAT THE HELL IS WRONG WITH YOU?