There are a number of ways to explore NavXp world of possibilities. This section on the site has been splitted in two, Skin Demos and Screenshots. Also, you can always request admin rights on our sandbox to preview the administration part of NavXp.
Except this section, the best way to get an idea is by downloading and installing NavXp on your server. Installation is made easy by taking advantage of DotNetNuke built-in mechanism, so you can install the module from Host->Module Definitions.
Until you decide to purchase and activate, NavXp runs in trial mode. This means you have full power when accessing from localhost, and limited usage in rest, which basically means NavXp will render only the first two items in the menu and display a link to the product homepage instead.