By far the best of the orthodox file managers for macOS: fast, snappy browsing, lots of power user functionality, Services integration in the contextual menu, huge amount of keyboard shortcuts for all those functions, many ways to configure it yourself etc. I tested many others, and they are either still too close to the Finder (incl. lots of bloat) like PathFinder, comparably little functionality like Commander One, buggy prereleases like FastCommander and Newton Commander, and ugly GUIs like DoubleCommander. Sure, some of the above have functions that would be nice to have in Nimble Commander, like the sidebar in DoubleCommander, but the overall file managing experience is best in Nimble Commander. As for speed, nothing can beat Rixstep Xfile, but it has too little functionality; FastCommander has nice browsing speed too, but it isn't quite there yet. I'm not giving Nimble Commander the full 5 stars, because there is still lots of room for improvement, e.g. archiving support for formats other than just zip, built-in SMB, AFP and NFS support etc., but even in it's current stage Nimble Commander (to me) is the best one out there.