I've had pretty much happy babis.

My first born well I was new at it all, but with my 2nd and 3rd, I think I was just more relaxed and i got them into a good sleep routine quite early (cos I knew what I was doing) which I think helped. That being said my youngest 2 boys both became really unsettled around 4 to 5 months, think they were just starting to get a bit hungry, once they started on solids they soon went back to being quite content and good sleepers.

Fingers crossed I have been lucky in that I didn't have any reflux or constipation issues.