For one, it's totally free and well supported.
Second, it's one of the best calendar/agenda/tasks plugins for WM Pro and completely blows away the stock calendar plugin.
Basically it allows you to completely customize how your important calendar and tasks appear on your today screen and it's very simple to use. Control the amount of content, size, fonts, colors, plugin height, etc.
More info, including bug fixes and the slew of new features added in v1.5 can be found at the developer's home site ..::TIEWS::.. or click here for a direct download.