I recently purchased the Empetua high-waisted shaper panties and the leggings. While they all fit as described, I did have some issues with the band rolling down at first but after wearing it for a small while, the problem went away and I no longer had to continuously adjust it.
The band rolling down happened only with the XL/2XL option. I had also purchased a M/L one and had no issues with the band rolling down on that one, so I think I may have ordered a size too large and that contributed to the problem.
All in all, I really do like them but I don't think they have as much compression as their ads lead you to believe, but they are extremely comfortable to wear every day.