Well, I must say the UDNNs are fantastic! The first night she woke around half past five, probably because she was excited but possibly because she was cold (it was very warm when I put her to bed so she was in the thinner cotton sleeping bag). The outside of the nappy was bone dry, except for one spot where it had come around the edge of the leg. The last couple of nights she's slept in much longer, and the nappy has been wet but not uncomfortable when she did get up. I"m definitely a convert, and it was definitely worth the money!