I use Moonscript and like it, but do not use the classes (partly for "leaky abstraction" and debugging reasons, partly performance concerns). I'm a fan of significant whitespace and most of the rest of its syntax sugar. The only part I dislike is the odd choice to use backslashes instead of colons for method calls. (I know leafo explained his reasoning many times in GitHub issues, but I still think there are some better alternatives.)

I also like Coffeescript though. If someone doesn't like Coffeescript, they probably will not like Moonscript either.