The result is really good, very similar to the ones achieved with professional programs. It can transform the picture by squares formed by 3 or 4 points.
Deformer Pro is really easy to use, you only have to drag & drop any point in the picture pressing right button. The deformation will applied depending on the movement of the mouse.
And if you dont like that change, undo it and try a new one. Apply zoom and have an eye on your new picture.
When finished, press F and then, save it. Output formats are JPEG, BMP and PNG.