Me too. I was actually rather elated by the possibilities. Made an old portfolio site prototype with it: http://www.getinfotech.net/hotbutton/index.html
But I’d say Muse was a major opportunity bungled by Adobe, because unfortunately, early iterations produced code that was essentially “laughed out of the business,” and perhaps rightly so, with CSS selectors as long as an airport runway. But provided you didn’t try to edit Muse-authored stuff outside of Muse, it wasn’t really a major issue, especially as generally available bandwidth expanded to the point that code-weight became less of a concern. More recent versions produce code that is quite tidy by comparison, but I believe it was too late to salvage the potential for wide-base adoption. Maybe it never had that potential, for all I know, in competition with the growing popularity of CMS.
I do almost no web-destined client work these days, and so never really went back to Muse as a regular tool. It might still be viable for a while, but once the announcement of impending death goes out, any forward thinker drops it in a second.