I got the slightly dubious "middle seat in 777 PE" upgrade on AKL-YVR a couple weeks ago. In my case it worked out fine as it turned out a couple had booked the A and C seats hoping to snag a free seat between them. They were happy to give me the aisle so they could sit together.

Not as nice, of course, as the outbound where my GF and I had the 747 upstairs BP cabin almost to ourselves. Now that was a great flight!