I tried Ember last night and apart from crashing it a couple of times it worked pretty well on a auto import for ~500 films.
I wasent really interest in the fanart but some of it looked pretty good, The posters that it got were all as good as the existing ones and i really liked fact that it pulled back stream info about the files (res, subtitles, codecs etc).
Plots were present for almost everything...
Mush easier that messing with a manager built into the UI and much better than F2