We didn't do CIO but had trained her to fall asleep in her own bed with one of us staying with her until she's asleep.
1) what do you do/don't do if you stay in the room. We don't pick her up and require her to be laying down. Now that she's in a toddler bed we sit next to her but not in bed with her.
2) how long did you have this routine? We started at about a year and she still won't fall asleep by herself and she's almost two.
3) how and when do you transition so they fall asleep on their own without you there?