We made it to 21 months, but I *think* we're done now!
I was ok with going longer, but the opportunity to wean came up, and I took it. We went a whole week without nursing, then I caved and let her nurse once, and now it's been another week.
She still asks about once every day or two, but is fairly easily distracted/redirected. She definitely asks more when she's tired.
And now I get to wear a regular bra for the first time in almost two years! Crazy! ;)