Without passing any judgement on the aesthetics of the site itself... have you taken a look at the page source??? That's horrible! The CSS is (believe it or not) worse. And what's with all the JavaScript?
Muse may be easy to use and all, but it's far from "great". If you're creating your own static site, I suppose it won't do too much harm (unless accessibility and SEO are actually important to you). But if you're a designer working with coders, please, please stick to PSDs or Fireworks files or similar. It's much easier to code a picture into a proper web page than it is to fix what Muse is creating.