It's an excellent choice for those that have to provide technical support or developer who have to design tutorials to explain how to use their programs. The range of output files is admittedly limited - CamStudio will only output in AVI format but you can also convert movies to Flash (SWF). You can also choose the codecs used to encode your screen capture shots and set the frame rate you need to capture at.
In 2003, the company was acquired by eHelp Corporation who owned a competing product called RoboDemo (now called Adobe Captivate). eHelp Corporation released an updated version as CamStudio 2.1 under a proprietary software license only and removed the ability to create SWFs. A succession of acquisitions led to the company being owned by Adobe.
Camtasia Studio is a comprehensive program for creating instructional or other videos using screen capture. The interface is accessible to all users at all levels, from novice on up, and the finished product you can create with this app will have a truly professional feel. You can test out Camtasia Studio for free for 30 days. After that the full purchase price is $299.