As ever with finger-controlled photo editing, the sort of precise work you can do with a mouse or other pointing device isn't easy, but for general broad stroke work, it does a good job.
The vaunted object removal/movement features work... if you have the right sort of backgrounds. You will note that the example in the app store listing has a field of some sort of long grass (all looking very similar to each other) and a blue sky (ditto). With something more typical, it leaves obvious clues as to what's happened.
But there are a lot worse programs doing less than this one can, and I found it easy to explore its possibilities. When it is free, it is a no-brainer.