Interesting, layout, although it certainly use some modification. I recommend these things:
1. spacing between the f keys.
2. Put the home/end on the FN layer of the Page Up/Page Down, if they will have a function layer.
3. Get rid of Menu key, put the FN key there.
4. Perhaps put that Print Screen Cluster where the Home/End is now.
I know that many folks would prefer the SSK layout, but as compact layouts go, I find it to take up too much space. My favorite compact layout out of all of them has to be the Matias compact boards. They are well thought out designs, as most Matias products are. It take up more vertical space than most compact boards with those F-keys, but I have found the horizontal space on a desk to be more valuable than the vertical space. And I do not have to spend time searching around for the right F-key, which is what I do with any keyboard that puts the F-keys on the function layer.