The only difficulty I have it where the thumb meets the hand. When I finished there seems to be gaps (or holes) that I have to sew up. The pattern does not say to do this, so I am guessing that these gaps should not be there. Ahh well! You can't really tell that I had to sew them!
Here is a picture of them:
I decided to scrap these mittens. I finished one mitt and it was much smaller than the previous pair (I guess because of the different yarn).