Well, I'm a new user on Wattpad, but from what I've seen so far, 写作 on it is fairly easy. I'm 更多 familiar with LibreOffice, though, so that's mostly what I use when I write. However, if you're on a mobile device and can't use Word, Wattpad is just as good. I hope this helped. ^^
Wattpad is awsome!!! I use it for all my stories. But I do request keeping an extra copy on Word, 谷歌 Docs, etc. Just incase something happens to one, 你 have extra copies to back 你 up. But I definitely think 你 should use Wattpad. It's an awesome way to get feedback on your stories.
