We're looking at using Muse. Have you found a good solution without hosting the files on a local server? Or are you change how everything is referenced?
You can't really use Muse in the Marketo environment, meaning that you can't build Marketo hosted landing pages with Muse. Well, maybe it's possible but Muse assumes a folder tree structure that Marketo doesn't support. I gave up on it.
If you're hosting your pages on your own server and using APIs from Marketo, you'll be fine.