The transition to the BBB (that would be "Big Boy Bed") went fantastic! We stuck with Junior's nightly routine, only he climbed into his BBB himself, instead of us putting him in the crib.
A couple things helped, I think. His crib was still in the room. And okay, I cheated a bit and shoved one side of the BBB against the crib, effectively making a daybed, with only one open side. I have to confess, the up-over-down-run-around circles he had been practicing on the BBB had me worried!
We also took Baby Tad and put him at the foot of the BBB. Baby Tad (who gets my vote for essential kid gear) is a stuffed frog-doll thing that plays up to six lullabies when you press his paw (who knew frogs had paws?).
After we put Junior into the BBB, kissed him goodnight and set up the new gate across his door (no escapees allowed!), we ran to the monitor and listened. Baby Tad finished his 6 songs. Then we heard "One minute to night-night". Junior had pushed Baby Tad's paw again! And then again. And again. Poor Baby Tad started sounding a big sluggish. "Damn you, Baby Tad, don't go out on us now!" I thought.
Then finally...silence. We had achieved sleep in the BBB. And we were thankful.