A WYSIWYG editor should be lightweight and easy to use, and should not break your design. That is what Expresso sets out to do. There is a choice of either a full, basic or light toolbar, although all toolbars only contain the most crucial text editing buttons. You can also create a completely custom toolbar. Strict precautions are in place so that pasting text from word or other sources wont produce ugly html and wont mess up your design when viewed on the site. You can define the css to be used within the editor so that the sites design is reflected there, making it easier to see the end result before publishing.