While Biolinum is certainly free to use, install, and download, not everyone has it on their computers. Besides that, and from a subjective standpoint, I don't

While Biolinum is certainly free to use, install, and download, not everyone has it on their computers. Besides that, and from a subjective standpoint, I don't like it very much. (Libertine is great as a serif font, though). Even though I don't like it, Arial at least is almost guaranteed to exist on a destination device. An added plus is that is very well hinted, thus making it very readable at almost every font size on screens.