I run a windows machine.

I started with google docs. My wife got a copy of scriviner, so I tried it out for a week before I bought my own copy.

In one week I ran into every single bug they produced. Formatting bugs, bugs to the spellcheck, saving bugs. Apparently none of these happened on macs, and they were rare on windows, but I managed to find every frickin' one in zero time.

They updated it and fixed the bugs, but that was well after that week. Besides, I started a new job where it was useful for me to have more than one input device, so I've been using google docs. I can edit it from any device I want, anywhere I am, provided they have internet or cell service.