I think I was really lucky with Rex & potty training. He was 2yrs 3mths when I did it. I started when I had a period of 5 days off with him & we just went for it! No bottoms & the potty went in every room with us. From then I didn't ever put a nappy or a pull up on him in the day ever again. Even if we went out, I put a cushion under him in the car seat & buggy & took a whole kitchen roll & numerous changes of clothes everywhere! I honestly think that it confuses them switching between nappies & pants. Day 1 of training was horrendous. He hardly used the potty & I wanted to pack it in! Day 2 was 50/50 accidents vs. potty. Then all of a sudden on day 3, it just clicked when he woke up. He's been dry on a night for about 9 months now too.