Chroma keying in Sony Movie Something

Well, it sucks essentially.
I like this program because it is very stable, intuitive and its learning curve is gentle.
And it is stable. Did I mention it? Simply hardly ever crashes. That's why I like it.
But look at this chroma keying!
I feel like after a date with a gorgeous girl she says she has herpes...
I mean, I don't mind, but it leaves a foul aftertaste, you know.