I like it very much. Using Ubuntu I have come to expect and love having my clock on the top of the screen. It just seems more logical for it to be there. I also like my menus on the top as well.
Very nice with the widgets on the desktop as well! The earth in your pic looks so lonely eh? Just a spec in the Universe.
I can't get used to having my menu at the bottom, when it was on the bottom I was always clicking in the wrong place, I like a minimalist approach to the desktop, can't be having 30+ icons all over the place.
I love the wallpaper, I like that it's quite lonely, not to be too serious about it but it reminds me that even at our biggest we're still quite small, plus I like that it shows the african continent, most wallpapers like this tend to show the european contiinent.