Not enough floss
I'm just about finished with this counted cross stitch, and there is not enough floss in the kit.
With several colors, I was beginning to get nervous as I got down to the last 5 or so strands of several colors. I kept thinking surely there will be enough floss for each color, but as it turned out that was not the case. I've been stitching for many years so I have an abundance of floss colors, but nothing I had seemed to match the shade I needed. It as even worse going to a fabric to see if I could find something close to the shade I needed, because of the lighting at the shop it was hard to find a match. I ended up just winging it with the floss I needed, and it looks ok, but it would have been a little less stressful if there had been enough floss in the kit.