I use XYPlorer and love it!! I still haven't explored all it's features, either. Some things: I used to use all kinds of other search tools, but now ONLY use XY... and I adore how it lets me save the data that result from the searches. I've yearned for a way to do that for years!!
I like the way it fulfills so many needs (like preview and property screens)...and it even easily launches me to webpages/programs/folders/files I've stored in the Catalog window. (I suspect that my telling the features does not remotely express how awesome they are.) Moving and copying things is a breeze. I do like Dopus (own it, too), but feel XYplorer is a better value. I turn to XYplorer most often when I need to do something. And Don is always improving his baby. Daily even. He never sleeps, I suspect.
He pretty much *gives* this program to the world, when you think about it. Figure the profits are next to none...after the project consumes most of his time. Don is a gem and I hope the world someday rewards his work and his energy and his beautiful spirit. (He's funny and brilliant, too...and I believe he dances the tango....)
Check out his mighty Beta Club (forum) if you really want to see how cool he is and what his many clients have to say.