The problem with other Photoshop plug-in masking tools is that many operate in the “click and pray” mode. You draw a couple of lines or paint the edge of your subject and then click apply and pray that it works right. If things don't work out the way you expected there is not much you can do other than start over again.
It's different with Mask Pro as you can see the results in real-time as you work. You can see your image on a new solid color background, a checkerboard or even against the underlying layer in Photoshop to visualize your final composite as you mask.
Masking images that contain hair can be tricky and often frustrating. It is difficult to use a tool that relies on edge detection to mask something like hair or other thin or transparent subjects.
As a plug-in for Photoshop, Mask Pro works differently by using color instead of edges. This allows it to easily create a mask that preserves the details you want and even removes unwanted ambient color contamination caused by reflections and transparency. Mask Pro actually paints away the colors that you do not want in your image, leaving a natural transition between the subject and background.