I have to say I don’t like them. My eldest was given one to try for an airplane trip when he was three weeks old, but was having none of it. I just breastfed him for the ups and downs, and it worked out fine (if you count us sitting near the toilets, and me falling asleep breastfeeding, him popping off and me waking up to my boob hanging out and a line of people standing around me waiting for the loo… Ah well, it was three weeks post partum and I’d had any modesty beaten out of me anyway!)
That kid got extremely attached to a blanket at about nine months old, and at 12 it is to be found hanging around the house somewhere he’s been recently. But he doesn’t take it out with him and hasn’t since he was about four.
Second kid absolutely loved, loved, loved his thumb! He was not ever offered a pacifier because he was a weak sucker at the breast and I wanted him to get the hang of that first. He did have long crying jags when he was tiny and at the flippy flappy stage and couldn’t keep his hand in his mouth. My mother solved that by flipping him onto his tummy and that was how he slept until he could roll over. All the while I was in a cold sweat about cot death but he took his naps in the living room next to me on a towel on the hard wood floor, and he slept on a towel on our hard thin futon on the floor at night, so he was always within hand’s reach.
He still sucks his thumb at 8 years old but he is cutting it out himself. He never sucks it out of the house and rarely ever except at bed time these days. He does have awful teeth but he has a very narrow head and jaw which the orthodontist says is a typical preemie shape (he asked if he’d been born early, which surprised me.)
I sucked my thumb till I was 11, my mother still sucks hers at 70 years old! (She didn’t know - my Dad told her after they got married that she does it after she goes to sleep! ) and we both have straight teeth and never had braces or anything.
One thing I don’t like about pacifiers is that a toddler can play with the paci in place. In my opinion a thumb is better because it can be washed easily and often, has to be removed from the mouth to play and pick things up, and can never be lost!!
On the other hand, as everyone else has said here, when you are facing the nth night of the kid being inconsolable, you’ll do ANYTHING and should be allowed to do it guilt free (if it doesn’t involve alcohol or a sledgehammer!) See me and the tummy sleeping thing!