There was a lot bad and good things at these Olympics. So I am not sure about the grade, but there was some interesting things for me:
North Korea participating at the games - very nice.
New technologies in the replay (Ice hockey, figure skating) - not all of them was useful, but it is good that Korea tried to use something new.
Competitions without disruptions, everything was according to plans, good organization.
The most shameful thing - Korean gold medal in women's team relay in short track.
In bobsleigh, luge and skeleton Koreans had the advantage, because they knew the track better than anyone else. But I thing it is not the Koreans problem. But it should be done something about this in future, because there was a big chance that not the best man wins, but another person, who knows the track best.
There was not so much spectators at some of the events, for example: Ice hockey.
By the way, there was a commercial TV, which translated Olympics in Lithuania. NEVER give a chance to translate Olympics for the commercial TV in your country! The quality was soooooo bad. Happy that there is Eurosport in Europe And internet helped me very much...