I just downloaded this to give it a trial and so far my exprience has been infuriating. I go to quick open a file - it takes 5 seconds to provide me a suggestion, I select my suggestion and hit enter, nothing, I double click, nothing, I hit the space bar, nothing.... Okay, let me maximise the window, I double click the window title, nothing, hmm, let me double click where the window controls are, nothing. It hardly feels 'Mac native'.

edit: after typing this out and letting it rest in the background, the quick open now actually opens a file.