I attended the National Ballet's Onegin on Saturday. I believe that the entire Orchestra section (600 seats) were groupon purchasers; they were a very appreciative crowd. Good for the National to get involved in this group buying thing which encouraged people who otherwise wouldn't have spent $170 to try out something new. I'm not new to ballet as a dance form, but I'm new to "the ballet". I quite enjoyed it as an interesting way to tell a story -- through dance, music and gesture but no words.
The cast was very well rehearsed, and there were some well-executed dance moves. A couple of minor stumbles from some of the principals but nothing off-putting. (And hey, I could never do it!)
So all in all, for me, a very enjoyable afternoon. I hope to go again. And I have no idea, maybe it wasn't well done at all , because I have nothing to compare it to, but I did enjoy it!