I spent a good portion of the last 3 days working through Dragon Age: Origins- Awakening. If you haven't guessed already I've kind of fallen in love with the original game on PC and have played it several times. That said, I didn't import any of my characters. I have one I'm working on that I wanted to import, but I wanted to get a feel for things first. After playing through as a female Orledian dwarf rouge, I've decided I really like the expansion and wrote a review.
You have to have the original game to play. More importantly you have to know how to play from the original game. That said, I think I like this campaign way more than the main quest. Here are my reasons:
1. No troublesome low level fight. You start at 18 with whatever you want.
2, The starting equipment is very good, and you can play through the whole expansion with it.
3. You don't have to let a single team member join.
4. The dungeons are a more realistic length.
5. Many choices make an immediate impact on the game.
6. The new abilities are pretty cool.
I think it took me 25 hours, but I'm not sure. I know I spent 8 hours playing today and probably about 10 yesterday. Its long, but not too long. There are a lot of parts that are streamlined. There is only one town and your fort and the dungeons. After the initial shock, I've decided I like that better. There is much less wasted time traveling around for no reason. Your team-members don't have as much interaction though. I did miss that, but I like no being forced to drag around anyone I don't like. Overall, I like it better than the original game. Even though it is glitchy.