I just finished up a Premiere Elements 11 Green Screen / Chroma Key tutorial. I just recently purchased PE 11 and I was pretty impressed with the functionality that it allows. I have been a premiere pro user for many years, so I think that helped with some of the techniques. But, if you are an editor with a smaller software budget, this might be a good solutions since it seems to have 90% of the funcationlity needed for most video productions.
Let me know what you think, sorry for the sniffles, i had a cold that week!