my DS2 settles to sleep pretty well but wakes twice a night (usually around 1-3am and then again 4-5am) given that my day starts at 6.30 with 3 year old DS1 without relent all day I am knackered.
He has two short naps, one after breakfast and a couple of hours around lunchtime, is generally happy. He recently switched from bf to formula, but tends to take up to 4oz several times a day rather than big drinks. he's enjoying his food and is generally happy as larry.
Don't suggest DH helps with night feeding as the bastard sleeps through the crying (at one point I got paranoid and thought that he was feigning sleep with the aim of making me unstable - really - and confronted him - I've got that sleep-deprived and deranged)so I would get woken anyway, in order to wake DH up and then negotiate with him to actually get up and make the bottle etc
really at wits end