Indeed! I have flown in that cabin and had a baby crying for most of the SYD LAX flt - we were in row 25DF, baby was at bulkhead in economy! It was not a quiet trip .

As with FA service, it all depends on the type of kids you get on the flight too (and of course whether their parents have a brain or not) . Mini DG is very well behaved and was the only child on our recent UD SYD LAX - I doubt people even knew she was up there until we disembarked (row 18). The FAs made far more noise - yes we got the "sit in the stairwell and chat all night at the top of our voices" FAs .

I think if I got the choice again, I would only sit on UD if I got row 16 or 17 AB (seats with good recline and space), otherwise I would go downstairs and try my luck in row 25H.

Totally OT for a second: I have just returned from doing an UD on SQ in Econ. WOW - I would opt for UD on those flights every time. Shame about the Gorilla I ended up sitting next to - ugh but that is for another thread/forum!