Getting used to more editors ..... "zettlr" is getting to be one of my favourites too.
The fact that it also supports latex (i.e mathematical connotations) and pandoc as well as yaml is an enormous pro.
Only for that I'd find it acceptable that live HTML preview lags a little. 
By that I mean that I don't really need a HTML editor disguised as a markdown editor and a good GUI for latex is gold
It really is very good and extremely well documented.
Methinks it's just what @Franc is looking for.
A very good contender next to "ghostwriter" as a default markdown editor for Elive.
