The performance is wonderful. I do occassional web page design, but not much. Mostly I take digital photographs and it handles iPhoto perfectly. Other than that I surf, email, etc... I do occasional graphic design. Not much or I would have bought a 15" or 17".
I've owned a 1GHz PB (Both 15 and 17") I love the size, weight, and feel of this notebook though. The keyboard is very nice, the size is just right. Very speedy, and handles everything I throw at it.
I was looking at all laptops from Apple and ultimately chose this one and I don't have a single regret.