Test Setup:
Pixelmator 1.5 Spider (3901).
Mac Mini, 2 GHz, Core 2 Duo, 4GB Ram, Snow Leopard OS X 10.6.1.
Pros:
Powerful layer editing program
Superb speed, most effects render instantly
Full Screen image editing with overlayed tool bars
Price for a layer editor with this usability
Cons:
A few glitches on occasion (one time I couldn't undo anything until I restarted the program)
Mac Only (con for Windows users, but there are probably more choices on that platform)
Bottom Line:
Bargain priced layer editing software, give yourself time to learn it and read online tutorials. Search popular video sites for: Pixelmator tutorial, or what ever you need to do in the program like: Pixelmator gradient tutorial, Pixelmator layer tutorial, etc.
What I would like to see:
A plugin to open files in Pixelmator in Lightroom.
More explanation in the directions on why you do something instead of just how you do something (like what exactly the layer blending modes are used for, why you would use a layer mask, etc).
Review:
There is a learning curve coming from an image editor/organizer like Lightroom 2 or iPhoto to a layer editing program like Pixelmator. Keep in mind that this program does a lot more than just your traditional image editing. However, Pixelmator is probably geared more towards photographs with some weakness in text formatting etc. However, my review is based around it being a photo editing program when you need more than Lightroom.
When I first jumped into the program, I found it terribly difficult to do a few things as my mind was in the Lightroom Paradigm. Everything has sliders, quick to make adjustments, and it is what I know very well. In Pixelmator it took me a bit of time to figure out how to do a few very simple things, but if you are familiar with Photoshop this should be much easier for you. Something as simple as a dodge in burn, I didn't know how to effectively use the layers to do this and was going about it all wrong. I finally searched for a tutorial and found one that explained how to make a duplicate layer, make the adjustment you want (like reduce exposure), and stick it under your main layer. Erase the main layer where you want to darken the exposure as the darker layer will show through from underneath. Very simple. What I had tried to do with no knowledge of layer editing programs, was select an area, make a layer from that, apply a filter (like gloom), and blend that layer with the other. Not so simple and complete wrong with sort of poor results. The instructions were not much help here, as they tell you how to make a new layer, but don't really tell you what to do with one. The instructions are very nice and easy to read though, and I think there is a link in the menu to some more how-to style documents/videos.
The program is fast and easy to use. I love the full screen image (edge to edge in full screen mode, just hit F), with the overlayed toolbars. This gives an awful lot of space to work on your image if you have a large monitor, and allows you to keep the toolbars near where you are working. Sometimes I do with the dialogs for the filters would open off center as they always seem to pop up right over where I am working and I have to move them, but this isn't a big deal. They do have cool special effects and are very easy to use.
Overall, I am amazed at how well this program performs for the price point especially given the price point of the computer I am running on (modest Mac Mini). It also shows how Mac OS X has come to a point where this is possible. I am sure Snow Leopard is of help here being a true 64 bit OS, and Pixelmator is built to take advantage of the graphics processing functions in the video card for extreme performance.
Great Job to the crew that made Pixelmator.