ArthurS,
I've been flying with these crew complements for over 3 years
. No problems (a few teething ones in the beginning, but that's because we hadn't done long haul before). Everything gets done, and we don't stress.
However, through various sources there are conflicting reports. Some claim it's awful, some say it's no problem. Some refuse to do anything but the bare minimum, some are professional. Some try to make sure it doesn't work, some do their very best and get everything done. As always, there are different views.
Gg