I pottied trained my 2.5 yr old ds1 last month and all is fine.
he still wears a nappy at night but he has started to take it off (not sure when he actually takes it off but he never has it on in the morning). the last few nights he has woke up at midnight screaming as he has taken it off and weed in the bed! and even if he doesn't take it off he is aware he needs a wee and shouts for me.
I suppose it is not a massive biggy as i change him and he goes back to bed. i just wondered if anyone else had this and what they did? he used to sleep so well and now i just wait for him to cry out. He is still in a cot but i was reluctant too put him in a proper bed until he was 3ish.