Lancs when I dared mention to MIL that we had co-slept (LO was days old!) she got her suck a lemon face and informed me it was dangerous. Needless to say I have communicated very little to her since. Her disapproval of our choices has made a huge rod, between us!
Go with what works for you, you're the one who lives with your child 24/7, and sleep deprivation is no joke. Remember, the CIA use it as a method of torture.
Here, I'm not sure if it's because feeding is more relaxed without the Colief eg no waiting to heat / express his starter (medicated) bottle but he slept 1130-530 last night
He did slightly cluster feed yesterday evening (5.30, 8.15, 9.30 & 11) which I let him as no starter to prep, and if it means 6 hours straight overnight it's worth it! So far no sign that it's making his colic/reflux any worse. And as a bonus, OH woke at 7.30 and took LO downstairs with him so I slept til 9 in total peace. I feel I can take on next week now, just as well cos OH's next day off is next Saturday 
Everyone who gets the long weekend, enjoy! 