I purchased Action about a month ago and the only thing I feel is lacking is the ability to record your webcam in a separate file from screen/game play. I noticed only one other person mention this in the forums so thought it needed it's own space.
For your average user the webcam feature is fairly nice because it aleviates a lot of the burden of trying to sync up the main video with the webcam. However, for any true "let's play" gamer who likes to have their webcam in full screen for effect to add slow motion laughter/scares or dramatic stare it makes it impossible to do (because the quality would suck with zooming in on the small video). So, you are back to using your old built in software or a third party software.
I feel like Action is on the right track (more so than many other software) to give a one stop program for gaming video/audio sync and webcam video. However, until mirillis adds a feature where you can record your webcam separately I will continue to stick with another software for that. There should be a hot key for recording the separate webcam video as well. Hopefully it's in the works. Keep up the good work.
-ricochetj