The features in the free plan are easily worth five stars to me. I use this because I don't like how Apple screenshots take a second to actually appear and save.
What I'm docking a star for is the humongous paper clip creature (I think that's Windows' Clippy?) that appears whenever you take a screenshot with a huge textbox asking you to upgrade to the paid version. Its quirky and I laughed the first time I saw it, but now its a bit annoying, sorry. :(
The features in the paid plan do look tempting though...
