This is probably one of the strangest CPU cooler mounting mechanisms I've ever tried, and I found it a little difficult to hold the Sphere, complete with mounting bracket and posts, through the top of the motherboard, while tightening down the nuts on the back side. True, the Sphere is rather large in diameter and overhangs the tops of the posts, which would make getting a screwdriver in there to tighten them from the top nearly impossible. Speaking of size, the edges of the fins come in close proximity to the memory slots, just clearing the first DIMM by about a hair. Depending on the layout of your board you may have to use the other slots if you want to be able to swap out memory sticks without removing the cooler first. On the plus side, the closeness of the cooler to the memory and radial direction of airflow means the Sphere should provide some ancillary cooling for the RAM.
The Sphere is just over five inches tall so unless you've got some thick side panel fans or a duct to get in the way, height-wise there should not be a problem fitting it into most full and mid-tower cases. The radial fan is lit from the center with blue LEDs which are visible out through the top of the cooler. Because the fan blades are an opaque black plastic there isn't much light that makes its way out the sides.
Let's wrap things up with testing and a conclusion.