Your DS is almost the same age as my DD3 and she's also fed to sleep every single sleep! I love the fact that it's (sometimes) quick, always works, is a lovely way for her to fall asleep etc but yes, it would be wonderful if now someone else could get her to go to sleep!

I've done the same thing with all 3 girls - the other two started self settling around 15 months or thereabouts. For me, using suggestions in Elizabeth Pantley's No Cry Sleep Solution book worked both times previously.

Good luck!