We had a look at BBFileScout before here on CrackBerry and I have been using it ever since. The application to me really is one of those "must have" apps that a power user needs. Aside from being a great file explorer for your device, the multiple functions built-in are great, being able to zip/unzip files directly on device and email them is great, being able to create playlists, edit file attributes, search and do so much more is great.
It hands-down beats RIM's built-in file explorer, and good news-- BBFileScount has been updated to version 1.0 and is now no longer a beta application, so go grab it today. It's donationware, so really it costs you exactly what you think the app is worth to you but be fair folks, this really is a great application. If you use it, donate, and hopefully more great apps will get made this way. And if you haven't figured it out yet... yes, I think BBFileScount is GREAT. :)