Quite a few problems, actually.
When they were finally finished, they were beautiful. They also were too small. They eventually went to live with a friend's mom, who has super small hands. I decided that I loved the mittens enough to try to reknit them-- y'know, once the sting wore off.
It took five months, but the sting has worn off, and I have a new pair of mittens.
They are beautiful, and I love them. They were so much easier to knit the second time around, and they fit much better. It feels good.
It is around 90 degrees where I live.