Messy
I use Celtx to write my comics, but I had problems. The most annoying is when you write on iPhone and later open the script on PC, all panels in the page are lost, sometimes captions too. Your script turned a messy, you lost precious time remaking the structure and if you use the iPhone app, it will happen again. So, you must use the pc online version or the app, not both in the same project.
Applebosta35678 about
celtx script, v2.9.9