My oldest i started at home at about 18months. he was great, but I didnt even try to do it until he was about 4 months off turning 3 outside the house. He trained straight away with day time but wasnt out of night time nappies until he was almost 4.
My nearly 3 year old is completely night time and day time trained. I only started about 2 months ago (he is 3 end of january) and just by a drunk mistake didnt put a night time nappy on him at the start of Novemeber and he has never wet the bed once all this time at night.
Very proud because I really thought he would take a long time to train.