Mine has arrived and I got about 30-40 mins game time in earlier. I did the first two missions and created my character, nothing else yet as I had to get back to work.
Initial impressions (a lot of comparisons with GTA I am afraid, but it is only natural):
- Graphics are ok, much more 'crisp' than GTA but less realistic. Not a positive or a negative, just something I noticed.
- Driving - Not keen on this so far, it is basically the same as SR1 which was fine at the time, but I was one of those that LOVED the driving in GTA. Hopefully as I play SR2 more I will become more used to it again
- Running and shooting - Love it, same as SR1, but now you can pick up objects and stuff as well. Much prefer this to GTA.
- Animations - Havok is old hat now for me, after the delights of Euphoria in GTA it feels like a step back, however it is still fun running people over and gunning them down

- Framerate - I turned V-Sync ON so I don't get tearing and the framerate so far seems perfect

Better than SR1 I am pleased to say
I am VERY much looking forward to getting into some of the random activities throughout the city. The above is just a brief summary of my initial thoughts and as mentioned with a natural comparison to GTA.
This game is completely different to GTA as said before and I would say this is a good thing. Pleased so far and can't wait to get into the rest of the game
ps. The 'cockney' accent you can pick is awful, lol!