MicrosoftNice. But editing is very very limited. E.g. there's no search & replace.
Collaboration has grave bugs so we have to take care only one person edit Markdown at a time. Some of these bugs:
* Editor goes offline sometines and does not connect. Yes, the top bar shows that it's disconnected, but the editor still allows me to do changes and all these changes are lost then.
* Because the very limited editing capabilities (see above, missing search & replace), I have to edit local copy synced by OneDrive app to my machine. Then, i have to make sure nobody else edit the document. I make changes, save to the local file and have to reopen tab with the online editor to pick the changes. (Changes are not picked even if I wait a long time.)
So, this feature is good for preview and maybe fix some typos very cautiously. Not for serious editing and collaboration.
Also, when I've tried Help > Send feedback then I just got "Feedback is not available"
