Saw the show yesterday (from Linctix seats C 505 and 506, on the far right orchestra in the second row) and loved it. I was worried about sight lines, but as someone mentioned further upthread, the only things I missed were a couple of entrances to the study due to the couch's placement directly between me and the study door. The leg room for our seats was fine.
I'll start off by saying my only exposure to the show has been through the OBCR and the film. I love both, and know the show well through them, but I had never seen a production before. Lauren Ambrose exceeded my expectations, and her "I Could Have Danced All Night" was the high point of the show for me. But honestly, I thought everyone was great in their roles, and I especially enjoyed Henry Hadden-Paton's take on Higgins. The set design and staging were very visually appealing - my only complaint was with the ensemble actually audibly talking during scenes when they were gathered together, because it was occasionally hard to hear Eliza talking over them, especially in the first scene.
For those who are looking to see the show in the future: when we went to pick up our tickets, there were several people trying to buy them for that day's performance, and they were all told it was completely sold out and they'd have to try the cancellation line. Granted, it was a sunny Sunday afternoon, but just in case you were thinking about popping in and getting a ticket last minute, know that it might not work out.