My daughter is 2 and a half and I started with her a month or so before she turned 2 and she was doing really well....then we had some traumatic stuff happen in our lives, tried to get moved, didn't move, and on and on, and she gave up interest. Things have settled down a lot the last few months, but now she isn't interested most of the time, however, there are days that she wants to. She knows that she needs to go, she will walk over to her play kitchen and hold onto it, raise her hand in the air (the tell it to the hand stance) and tell me that she does not want to go on the potty, she does not want Junior Mints (her treat for going on the potty) and then states that "I'm FINE". If I try and put her on the potty at this point, she will not go and will scream....as hard as it is, I am just letting her decide when it is time, which obviously isn't now. She has big girl panties and she will pull them out of her drawer and want to wear them and I tell her that when she stops going pee pee and poo poo in her panties then she can wear them and ask her if she wants to do that and she usually says no, so we will wait.....and I am the one that needs to just sit back and let it happen. Good luck.
A.