I'm not particularly impressed with the Note 2 - lower screen resolution (and much lower ppi) and larger dimensions are a turn off for me. On the up side we'll get several of the new features with the Jellybean update (on the downside that will probably only be early next year). Quad core and more RAM sound great but I haven't encountered an app or situation that has caused me to run out of either yet.
I was really hoping for a retina display though or that new semi-flexible display technology they were supposed to introduce, even AMOLED+ but despite Samsung claiming the display is the 'best ever', it's actually much worse than the original (though 5.5 inches at least from a usability perspective is nice). I do wish they hadn't made it wider and taller though, I feel like they could have shrunk the device slightly (and kept the screen size) if they dropped the physical buttons and had the screen reach the ends of the device on the left and right.
But then maybe the incremental changes are a good thing - current owners don't feel like they've lost out and new owners can still be proud of having an 'improved device'. I remember the same situation when I had the S1 and saw the S2 (just not enough to convince me to take out another contract), but if I'd stayed with the S range I would have been quite happy with the S3 which came out when my original contract was due for an upgrade.