But I'd say the best thing about this skin is how many different plugins it supports. Just read that list. How many other skins can do that? It even supports some very old plugins such as MyPrograms, plus my own personal favorite, MyAnime2.
As of writing this, the current versions of the Black Glass skins need to be updated to work with newer versions of some plugins (e.g. WorldWeather) but the skin's author constantly works on it to keep up with things. Good support is good to have.