I just wrestled a bit with this plugin and got it working. Indeed it is very easy to use and requires almost no configuration. I am now coding directly in LESS and refreshing the page automatically generates appropriate CSS files. Amazing!
However I do think some changes in the instructions would be of a lot of help. First of all I noticed that the code you use in your wiki is not valid; be aware of the difference between using ' and ` and ‘.
More effectively would be a more foolproof approach for people not wanting to dive into the code. I am thinking defining a folder (let's say /less/ in the theme directory) in which .less files will automatically be wp_enqueued. Another option is an interface for the plugin in which the LESS files can be defined.
Let me know if I can help with any of these things, really like this initiative!