Dedoimedo posted a review of Kubuntu 13.04 Raring Ringtail 64-bit edition

It is time to test the third sibling in the Ubuntu family, the one named Kubuntu. So far, we've had Ubuntu, which was somewhat bland. Then we also had Xubuntu, which worked like a charm, except for a kernel oops thingie affecting the entire range, a silly thing to coincide with the official release. The KDE version is next.

However, unlike all other tests this spring, I will do something rather unusual. I am going to attempt to upgrade Kubuntu, in-vivo, from Quetzal to Ringtail, using the package manager's internal functionality. True, this kind of review will skip a lot of what I usually demonstrate in the live session and during the installation, but it will expose many other interesting little bits. In general, I always advocated against doing these upgrades, because they were buggy and often ended in a fiasco. What now, you wonder.

  Kubuntu 13.04 Raring Ringtail Review