I'm going to give it a try. There are certain programming languages that I use rather unfrequently like python or bash script. But when it comes to the point that I need to use them, I allways realize that I tend to forget so many useful commands and API calls, so I have to look'em up once again and again. My point to this phenomenon is, that when I'v just looked up a (in my eyes) complicated unix command e.g., that at this very moment I know that I won't remember it two or three days later. This tool might be a good help to note them down and help me to memorize them.