I use Pixelmator for all of my "main images" on my blog as well as other images I create.  For instance, I created my website logo using it, my husband's blog logo, and numerous iron-ons for some DIY shirts (Birthday Shirt and Disney Shirt).  We spent approximately $15-$20 2 years ago on it.  I would say we have definitely gotten our money's worth.  I also have the iPad/iPhone versions as well.  I believe that cost around $10.  Since my husband and I have family iCloud on our devices, we were able to also share the use of Pixelmator on ALL of our devices (including our Macs).