I test all Markdown Editor (Windows) I meet. This one is very impressive. Very clean interface, Markdown autocompletion, handy shortcuts. It’s like the next Caret but working for Windows :-)
It manages Manuals, tabs and history.
The downside is the same as for most Markdown Editors : will it be maintained ? It’s still in beta and there is no recent update.
All this said, I think it’s a very cool Markdown Editor and I think it will be my favorite for the moment as Caret for Windows has some glitches.