I use this program everyday commercially and I enjoy working on my own pictures in my spare time. It hasn't taken me long to fully understand Adobe Photoshop CS's power and compatibility.

If you're new(extensive help menu) to graphic design or digital photography(especially now that CS supports RAW camera data) this is the program to start with. Adobe site also provides unique tutorials submitted by everyday users.

Besides interface improvements, notable changes to Photoshop CS is the capability to export to Macromedia Flash(SWF), Full 16 bit support(Photoshop 7 had restrictions), Filter gallery(which has sped up production for me quite a bit, allows you to view every filter before applying it),histogram palette(which allows you to perform your image adjustments while keeping an eye on the real time histogram) and photoshop now supports DHTML and XHTML.

I bought this product because I fell in love with Photoshop 7, and to my learning pleasure it was a very natural transition between the two programs. Nothing bad at all to say about this program, always had positive experiences with it.