CS2 VS CS4

I need opinions!!!

I currently have CS2..have had it since it came out. My hubby told me last night to go ahead and upgrade to CS4 but I am worried about making the switch. I use PS not only for scrapbooking but do tons of photo editing as well...I learned PS for photo editing first and digital scrapbooking came a few years later!!!

Those of you that have CS4...how do you like it? Did you upgrade from CS2 and is it that different?

Do you know of any websites that have tutorials and "getting to know" CS4. I have heard that some of the shortcuts are different.

Thanks!!

I believe that CS3 and CS4 have better photo editing options than CS2 - basically it's like CS2 combined with Lightroom. I'm still using CS2, though...I'm waiting until I get my Mac to upgrade.