This looks cool and very well put together. It's obvious you've paid lots of attention to detail. At our company, and I suspect many others, there is lots of collaboration between the design side and the implementation of the design (these roles are exclusive). For our purposes, we don't really need pixel-perfect designs, as we just like to get a rough idea implemented, then iterate on it. How do you use this tool in your workflow? Also, how do you use the CSS feature? I would never copy/paste generated CSS into code, but I guess it gives you something to start with?