Great editor, with a lot of freedom to quickly and effectively improve and edit videos. It would be nice for it to have more compatibility with the predominant Camcorder Format AVCHD (but these can be converted.) Also, output formats would be nice to expand (audio only even). The 4 stars is basically for the lack of compatibility with this and other formats.
I think this does stand toe to toe with other editors Ive used and for my purposes it is excellent. I really like the ability to layer and have 2 videos run side by side (by cropping the top view.) For our purposes in Functional Therapy Magazine we can display an exercise in "head on" and "profile" views which really helps you understand how to do the movement.
It also allows great screen capture and special effects. It has many features that I dont use but its intuitive interface lets you try things easily to see how they work and if they help.
Ed Kaine, OTR/L, RFT
Publisher of Functional Therapy Magazine
Ed Kaine, OT, RFT about Camtasia 2