I love gro bags! F has slept so well, we have a really cold house (monitor says 16c) and he wriggles a lot in his sleep, so think loosing his blanket wakes him up a lot rather than hunger. Slept from 11-2.30, 3.15-5.45, and just about to put him back to bed after a feed now. Also think I have the gripe water to thank, although he is struggling to poo (little straining faces!)
And to top it off, DH has slept all night in the bed with me, first time this week!
Clarella I express a max of 3oz, but F can drink 7oz of formula in the evening and still demand the boob, so definitely think it's a comfort thing.