While I agree that there are other educational distros out there, the reasons why Ubermix is being used at our district on over 400 netbooks are the ease of install with thumb drives and ability to quickly reset (reimage) the device by students/teachers. Also the RAM footprint of Ubermix is lower than stock Ubuntu which helps on our machines with 1 GB of RAM. Oh, also the fact that windows are set to open full screen. Basically it is a distro designed by a school with a small IT staff for use on a large amount of netbooks (which is exactly our situation). That is the power and peril of GNU/Linux, a group can create a distro that meets their needs. This causes fragmentation, but without Ubermix there wouldn't be any GNU/Linux in my school district at all.