The owners say that long hair presents a unique set of issues when it comes to care, styling, and maintenance, and use different cutting and brushing techniques on their clients than you'd find at a more traditional salon. A trim alone, for example, can take an hour, and they cut dry instead of on wet hair. The salon also takes regular, shorter-haired clients and people who're growing their hair out, so it's not as small a clientele as one would imagine. If you were growing your hair out, do you think you'd visit a salon just for long hair?
Be sure to check this gallery of extreme long-hair styles, too.