We have had Photoshop CS4 running in the studio for a couple of months now. I have to say I have not seen a need to open up sketchbook pro since. Adobe Photoshop CS4 has made dramatic improvements to it’s tablet sketching sensitivity in this release. It still is not as good as Sketchbook Pro, but just the fact that you have all those tools sitting there in the same interface does it for me. The sketchbook Pro’s interface is revolutionary and seamless but Phototshop has tons of goodies that we all know about and love and that little difference in tablet sensitivity is just not enough for me to go back to sketchbook.