I have three. One 1Ghz and two 1.67s . And two 17" MacBooks. Ever since Apple started doing 17" laptops I took these because for graphic work it's perfect. True they are heavier , you need a bigger bag, some have graphic chip or screen issues (but same for the 15"), and spares are harder to find and more expensive.

But I can't find the same comfort with a 15" , even a retina...  Plus the cool factor.

I've yet to find a good last model A1139, somewhat rare and still expensive.