I started working with chroma key projects a while back, bought this, fooled around with it a bit, but really didn't understand it.
I have since began to continue my work requiring green screen, took a deep breath, and watched the video a couple of times. I am trying to create a green screen in my bedroom...I have a very small house. Anyway, I was astonished, once I found out how to properly use it, how quickly I was able to get up and running with this. Lighting a green screen is really tricky in a small space, but I actually did it, created some proofs of concept, and now chroma key is not as daunting as it once was. I really honestly could not imagine trying to make a good chroma key without this app.