Not having a long experience with css, I have managed to use this extension very easily, but I also saw a small problem. Wanting to use Google Web Fonts in Greek, the component was not showing the characters preview correctly and I had to see the fonts previews directly from the Google Web Fonts site, in order to decide what font to install. I tested it in Chrome, Firefox, Camino, Opera & Safari, all showing the same. This is the only reason for my rating as "Good" and not "Excellent". Kepp up the good work!