Transitioning to twin bed?

If you transferred your babe to a twin bed from a crib, did you have any issues with them not sleeping or liking the new arrangement?

My son has never tried to climb out of the crib and I liked the idea of him not being able to get out while I sleep. But im pregnant with number 2 and it's getting difficult to lay him down and pick him up. I dont want to switch to a toddler bed. I'd rather just go straight to the twin bed to save money and I'll likely use his crib for baby #2.

What was your experience with it?