Anecdotally, everyone I know that wants a front end, wants a controller/couch based front end. Like me, many of them have run the gamut of front ends that provide this, have found them lacking, and end up here. Unfortunately, if this is what you want, a nice console/couch based experience, there is no way that you can try this out without first purchasing BigBox. There is no demo or trial of any kind. I very nearly skipped past LaunchBox because of this.
Trying out LaunchBox will give you an insight on the quality of the application, how easy it is to configure (even if you use BigBox, all of your configuration will be done via LaunchBox) and the plethora of options, pre-sets, guided wizards, and other things that really make the system shine and stand out from the competition. For what they are asking, it is very much worth the cost of entry. Buy the $20 license, and if its everything you want, or if you want to support the developers to make it better, upgrade to to the $50 license (they have an upgrade option).