It depends on how important your html is to you. According to the W3C recommendations, tables should only be used for the display of tabular data, not the layout of pages or elements on pages. They can potentially cause some porblems for screenreaders for example. However, the CSS firendly adapters are poorly documented (in my opinion) and quite hard work. I wouldn't use them. But then I wouldn't use the menu control either. I'd roll my own.
A lot of the standard controls are not particularly great when it comes to the markup they generate, but I suppose you need to trade off convenience for optimal html - which won't affect how the vast majority of users see your pages anyway.