Worth every penny in my opinion. Infinitely configurable. From an Amiga angle, you can make it behave like DOpus 4 or DOpus 5. Slightly cheaper version is available if you're willing to sacrifice some options.
Because there are so many config options it can be a bit daunting to set up to your liking, but I literally cannot do any serious work without it. I find Windows Explorer to be an utter joke in comparison.
There are some pretty good videos from the Dev team on YouTube highlighting new features in major releases - check those out to get a feel for what it's like. Unfortunately they don't seem to have a general introduction/overview video.