There are lots of cons to WYSIWYG* and if you are doing any significant quantity I strongly suggest learning the underlying languages (HTML & CSS for web design). However for minor to moderate usage I definitely understand that it is really handy to just use a WYSIWYG editor and it won't bite you... probably.
With that warning out of the way... I would recommend Microsoft Visual Studio Express for Web. It is more than just a WYSIWYG (ie has ASP.NET building functionality, some automated quality/validity checks, spell check, and lots more) but it is the best WYSIWYG web designer that I know of. It's WYSIWYG editor is very similar to Microsoft Word in terms of UI. It does require a reasonable system - like less than 1gb ram and you will suffer a bit.
It does not support the Mozilla Firefox (-moz) or the Google Chrome/Safari (-webkit) development css rules (for example) but that is quite a minor issue that you'll never run into unless you actually know the css specs/browser development status.