I've been using it like crazy as you've probably noticed by now. I did upgrade to the premium for $2.08 a month, but to me it's worth it. Let me say you get tons of apps for free so you really don't have to upgrade to premium if you don't want to.
I will give you an example of the cool things you can do with this program.
Here is the original photo of Sydney that I took. I shot it with my Nikon D40.
And here is the edited version of the same photo:
My new favorite app is called Gritty. I love it! Here is what it looks like.
Then of course you can add text, borders, make collages and the list goes on and on. Check it out. See what you can come up with and put a link to your blog in my comment section. I'd love to see your photos.