True, however GIMP's great advantage is its open-source nature. You don't have to worry about additional costs or a missing feature. If there is a feature that needs to be added, somewhere someone will create it. Just look at GPS for GIMP and all the other superb plug-ins all available for free. With GIMP you have a lot of freedom and a lot of choice whereas with PS, once you've bought it, like it or not your stuck with it.
Anyway I apologise for picking on PS
Looks like a great tool (an expensive one), but that's all these software packages are, Tools. Still I would like to see DA featuring more open-source content...