Don't pay any attention to the guy that said this plug-in causes advertising on your blog or site. That's BS - the advertising is within the administrator page and no more than dozens of other plug-ins have. I personally have no problem with it, especially considering the usability and simplicity of adding this functionality to my site.
I HAVE TO SAY THIS IS AN EXCELLENT PLUG-IN!
I was looking for something else on my site that added to the functionality and ease of navigation when I found Strx Magic Floating Sidebar Maker - it does exactly what I need very easily and has the needed configurations to make it fit exactly to my requirements. Great job and thank you very much!
You can check out my implementation of it on my site http://TripleRPhotography.com.
Highly recommend this plug-in!