I tried at 2 with my son, he went really well at the start, but then regressed and I ended up putting him back in nappies after 7 freaking months...the relief for both of us was huge! Then, about 4 months later (maybe? I can't remember exactly), he started asking for jocks again. I was so traumatised from the first round, that I refused. It got to a point that he was insisting and wouldn't wear nappies, so I let him go into jocks and it was super easy. Hardly any accidents and he's been reliable for months and months. He turned four in nov. my daughter is 14 months and I have zero interest in trying tt with her until she is well and truly ready!