I wouldn't have a clue how much Niall is getting... I can't seem to express very well at all ATM... too engorged. I've been using a Kaneson manual pump (awaiting a hired electric one from a pharmacy). This pump worked for me with my previous children so I know my technique not's failing... I'm just too full and really couldn't be bothered mucking around anyhow because Niall is feeding so well. All I know is that he is sucking very efficiently for about 10-15 minutes every 4/5 hours. In between he is sleeping... only cries when i change his nappy which is regularly wet/dirty. I think these clues all add up to a baby that is getting enough

ETA: Actually 4/5 hours is the longest he's gone for and that's at night... sometimes I give him 3 feeds within 2 hours.. it really varies... guess you'd call it demand feeding... whatever it is I'm happy with his level of demand ATM.