My DS is 4.5 yo, and also no where near ready for undies at night. I use the baby love pull up pants, and I have noticed that if he has a lot to drink before bed, he occasionally wets through the nappy, so I have to give him less water before bed. Also, he loves to sleep on his tummy, so we get an accident here and there, not often though, where his pj top is a bit damp at the bottom as the wee is travelling up the front of the nappy pants I guess?? I would switch to huggies, they always worked well for us, we've hardly had any accidents when he was using them. DS has never been a nappy 'soaker' at night, in fact when he went into his big boy bed, he had a dry pull up nappy at night for almost 6 months, every night, then I got excited and mentioned undies at night time, and right on cue he started to have wet nappies at night again lol.