I have always heard that girls were easier. But I do not know... My stepson is still working on it, we got custody of him right at 3 years old, and his mom was using pull ups as diapers, so it was really hard for us. He is going to be four soon, and his visits with his mom are taking major steps backwards in our process. He will go in the toilet, but not unless we tell him to. So good luck to you!