Not that you need further convincing that style sheets are the way to go, but here is a quick rundown of the benefits of using style sheets.
Precise type and layout controls. You can achieve print-like precision using CSS. There is even a set of properties aimed specifically at the printed page. Less work. You can change the appearance of an entire site by editing one style sheet. More accessible sites. When all matters of presentation are handled by CSS, you can mark up your content meaningfully, making it more accessible for non-visual or mobile devices. Reliable browser support. Every browser in current use supports CSS Level 2 and many cool parts of CSS Level 3. ome to think of it, there really are not any disadvantages to using style sheets. There are some lingering hassles from browser inconsistencies, but they can either be avoided or worked around if you know where to look for them.