It's an interesting and different approach. Essentially this shows files and folders with size and modified (or created) date. It's remarkably smooth and fast, and offers an intuitive and helpful way of looking at your files. Navigation could use a little tweaking; for example, I'd like to be able to navigate back or up through a path from the toolbar instead of just the menu or keyboard (disclaimer -- I've only played with the demo for a little while; there may be ways to modify the toolbar or something, but I didn't see them i the preferences or other places I looked).

I've marked the documentation down a little but it looks as if the developers are working on that. They suggest a video which isn't up yet, for example.

I don't think I'm going to use it yet, but I'll keep an eye on updates and see what's new. It has potential to be a useful Finder alternative, I think.