This Calendar system is a very simple and functional add-on that allows users to post anything significant into a Calendar system for all of your members to see. I also found it a bonus that instead of linking itself in the Nav menu as many add-ons do, that it instead links itself in the sub menu.
When you first install the Add-on it comes in the default color scheme. Generally speaking, I'd knock off a star for this because it makes you perform additional work to match your style. But Andy included a simple .css file which can be used to style the majority of the add-on and he does it in such a way that even someone such as myself, that isn't too keen on coding, could easily make the changes and make everything match up wonderfully.
Andy himself has been very supportive of my issues and errors and he even personally oversaw me doing some work on his add-on via my site and fixed issues he noted himself without me having to bring them to his attention. He's a wonderful developer, and this is a wonderful add-on.
Thank you very much for the amazing mod.