Ninja Access did exactly what I needed it to do and now I can easily set modules to appear hidden to members! Great extension, easy to install and set up.
Not only does it work as advertised, but the support is awesome. My template was causing issues with the module's title (not the fault of Ninja Access). Within a day of posting this issue in the forum, support accessed my template as admin and added some code to get around the template issue. Now everything works perfectly!
Needless to say, I highly recommend this product to anyone who wants to control what registered members have access to.