The task I'm trying to achieve with Pixelmator is opening up a PSD and quickly (because I generally have to do it a lot) crop a piece of the image but also removing layers that I don't want in the finished picture.
This is for making little pictures out of PSD created by graphic designers to be later used in web application (for example, if there's a round button, I want the button, the icon inside but not the background, it has to be transparent, so I want to remove or hide those layers).
I'm evaluating Pixelmator as an alternative to Photoshop to process PSDs into HTML and CSS.