I didn't like the demo that much. Hopefully the full game is much better.
I loved the original Motorstorm, had lots of fun playing online and finishing the game. I know Pacific Rift is well improved in terms of adding splitscreen multi-player, improved loading, more varierty in graphics, more tracks, etc, but I didn't really like the demo track compared to the Motorstorm 1 demo track, of course the graphics are likely well improved for the final build, but for me it was pretty so-so. I expected more.
Still not sure if I'm going to get Pacific Rift. I prefer fewer kick ass tracks vs double the amount so-so tracks.