My step-daughter Paige who's three used dummies until she was about 2, her mother just took it away one day and said the puppy ate it. Paige apparently handled it really well. Cried for a little while but ultimatley accepted that the puppy had eaten the dummy and that it wasn't coming back.

I would be fine with using it as long as Bub is able to accept it when it's time to stop using the dummies.
It's definitely better than thumb sucking IMO. My little sister Lulu sucked her thumb constantly from birth until about the age of nine or so, and she's had to have massive dental work to fix the damage from that. Like getting two teeth pulled and braces for the last few years. She's 17 now and it completely screwed up her teeth development.

I don't like the idea of a dummy screwing up Bub's teeth. I guess all the horror stories got to me.

We've bought a couple for a just in case sort of thing.