One day about a month ago, Emerald decided she was done with diapers. After two days of transitioning to underwear with a few accidents on the way to the potty, she stayed completely dry. Day and night. She started asking to wear underwear while she was sleeping which I was incredibly nervous about. So I made her a nap time and bed time sticker chart and told her once she filled her chart up she could wear underwear to bed. Every time she woke up dry she could put a sticker on her chart. If she woke up with a wet diaper, she would have to take all the stickers off her chart and start over (so I knew she could stay accident free overnight for a full month straight).
This kid never looked back. She never wet her diaper in her sleep so we never had to start over with the stickers. If she had to go potty in the middle of the night she'd wake up and ask for help. It was quite impressive.
When her chart was completely filled up, we made cupcakes to celebrate. And she LOVES wearing underwear to bed!