Have you made sure you're logged in and clicked the "write a review" link? The feedback button has been replaced by that link. You might have to log in (and that's another thing: the site will time you out insanely quickly), click on the Box link, and then go into the products from there. They seem to have specific versions of items (like the stila try-me set of luminizers instead of the full-sized version) linked from there, so if you try to review the wrong version, you won't go anywhere.