Personally, I love them. I think that they are really nice. What do you think?
Go to https://launchpad.net/~ubuntu-typeface-interest and click “Join this team” (you’ll of course need a Launchpad account). You should receive an email when you have been accepted to this team. When this happens, do not install the deb! Add the PPA so you can stay up to date with the latest versions of the font!
Important: only join this group if you are willing to provide genuine feedback! Also, most people will be accepted into this group. If you have just created a Launchpad account and/or have 0 karma however, it might take a while until you’re accepted.
Upon being accepted, go to https://launchpad.net/~ubuntu-font-beta-testing for the instructions. Read them carefully, then go to the PPA and read the instructions again. Don’t just add the PPA – > you’ll have to manually add the private PPA to your sources.list! Also, don’t manually download the Ubuntu font .deb files as you won’t get any updates!
Note: clicking the last link in the post without having gained access (by joining the Kubuntu users team or some other team which has access to the font), you’ll get a “page not found” error.
Thanks goes to Webupd8 for these instructions.