The economy classes on my recent SYD-JNB flight was oversold.
Then, within T-24, a whole bunch of economy inventory freed up and the premium inventory dropped. Obviously many people wanting to part points for upgrades had their wishes granted. Personally I wished otherwise and then would have been in the running for an op-up.
Of the 32 seats in Y+ on my flight, between a third and half of the cabin were little kids. That curtain between Y+ and Y was good to keep them within their space, particularly since I was sitting just behind that curtain (row 40). That is, except when they needed to use the loo (Y+ doesn't get its "own" loos; the closest are those behind Y row 41).
It was odd in row 40 in that even though I turned off my air vent and the hot chick sitting next to me didn't have her's on full blast, I could still hear the loud sound of air being blown. The air blowing was so loud that it was almost impossible to hear the PA announcements from my seat unless you were listening to them through the IFE.
The floor was quite cool even with the vents turned off; thank goodness for the blanket which I quickly unrolled after we levelled off.