I think after a few weeks it is common for you to feel "not full". I think it just means that your milk supply is established and your body has figured out how much to make, so you don't get that "bursting" feeling anymore. It certainly sounds like your lo has it figured out, so long as he reaches his diaper count every 24 hours, is content most of the time (I say this 'cos most babies have their fussy moments), is gaining weight well, then all is good. How old is Marco? I know I have seen you around somewhere, I remember your avatar 'cos we had the same bouncy chair!