I use Kdenlive about once or twice a year to edit/compile racecar footage. The UI has been friendly enough to relearn each time because I use it so infrequently. I've never had any complaints about it, though I'm not doing anything crazy. But it's extremely intuitive and even as a new user it doesn't seem to get in my way, which is just about the highest praise I can give to a piece of interactive software.

Unfortunately I can't compare against Lightworks or Blender, because I tried Kdenlive and it worked great, and there was no reason to search for alternatives.