So... Completed Portal yesterday 
I have no idea why I didn't play it when I first bought it, but I have to say it was excellent.
Although some say it was quite short, I'd say it was about right for what it had to offer. My question is however, is Portal 2 really worth it? Is it just more of the same? Or does it offer something different?

I have no idea why I didn't play it when I first bought it, but I have to say it was excellent.

Although some say it was quite short, I'd say it was about right for what it had to offer. My question is however, is Portal 2 really worth it? Is it just more of the same? Or does it offer something different?