Dreamweaver v Muse

Muse is easy to learn and is adequate for hobbyists and designers who don't want to worry about code.  However professional developers would never consider using Muse except possibly for a quick mock up to show the client beforehand.

All that ease of use comes at a price.

1. Muse is very limited in what it can do.
2. Access to HTML & Javascript code is minimal and often difficult.
3. It cannot support PHP or databases.
4. Exporting to HTML code and trying to edit code in a plain text or HTML editor is futile because the code Muse generates is horrible to work with.  It's bloated & there's almost no logic to it.
5. All you can create with Muse is static HTML sites.  Don't ever expect to do anything more advanced because you can't unless there is a plugin for it. 
6. If you decide at some point to do more advanced stuff & switch to an HTML editor, you can never revert back to Muse.  Be prepared to use Muse for the life of your site.

In contrast, Dreamweaver can be used to build anything from basic sites to HTML emails, to sophisticated database driven mobile and web applications.  You're only limited by your coding skills.   Not the software.