I got it recently.
It's fun, but it is what I said it would be; one with more moves and different areas. Granted, the areas are more varied, but it's still a matter of doing the same thing over and over again.
The tomb parts were a nice addition, but even though they're different, it's still just an additional part you have to repeat. The free-running aspect of it would be much more fun if it wasn't so cumbersome, and the guards are so easy to escape from that they might as well give you a trenchcoat and joke shop glasses; it's hilarious.
My biggest gripes are that there isn't a stealth stance and there isn't an easier way to change weapons; making you go back to the Villa is redundant.
Regardless, it is like the first one in all the good ways, too. It's fun, fairly addictive and the good points are just captivating ENOUGH to make me overlook the fact that sometimes it bores me to tears.
If you've got one, you don't need to get two, but it's fun. I like it.
The fact that some people consider it the game of the year, though, is laughable, because it wouldn't touch Arkham Asylum, Left 4 Dead 2 or Resident Evil 5 if it was a oversexed octopus and they were all very ripe young women.
-AC