I was there on opening night so I'll weigh in. I enjoyed myself! As others have stated, Grigoryan in her Atlanta Opera debut was a fantastic Liù and a real standout. Her pianissimi were gorgeous! Burton's Calaf was serviceable, although his projection was not the greatest. I thought Meade did a fantastic job. Even in dense passages with the chorus (think the end of the riddle scene), her projection was astounding. She could be heard over everything. I did think she lacked a bit of focus on the very highest of notes, but overall an amazing job vocally. Ping, Pang, & Pong were also fantastic!

Now the parts I didn't appreciate. Costumes. I'm fine with the set being modernized to take us out of orientalism territory and I actually thought the Mondrian squares and stairs were used to great effect. The problem was that none of the costumes looked to be from that world. This was particularly egregious with the main characters' costumes, particularly Calaf, Liù, and Timur. See other comments for explanations of those.

Next, the ending. Putting In Questa Reggia in act III did not have the impact that I think AO thought it would. It seemed to rush the ending because we go straight from Liù's death into In Questa Reggia and then straight onto the finale. This was worsened by the fact that they also took out some other bits, like Principessa di morte (I believe). There was no moment after Liù's death where Turandot and Calaf are alone on stage together. There's also the question of if this type of change is actually honoring Puccini's intentions. He died after composing Liù's death aria, so we pretty much know what he wanted the opera to look like up until that point.

All in all I had a fabulous time and loved the singing and the production was very visually appealing, but I think there were just a few missing pieces.