You know your kid best. I don't think my 16 month old would get it. She gets very busy playing and just doesn't notice until she has already gone. I know because she often has big misses when we do naked time, and I am watching her, but she just doesn't signal. Some days her mood is different and she wants to potty, but lately she has had teeth coming in and it is not on the radar. She is just not ready for undies yet, but every kid is different. I am thinking it might be better to try after her canines are all emerged.
What diapers do you use? We avoid stay dry and I think it helps with bodily awareness...
Mommy to my girl M (b. June 2011) and baby boy G (b. July 2013)