This was mentioned in the “Report a Problem” section (http://gsfn.us/t/2wyx1) but I figured it would be better in this section so people can vote on it.
I just started using Unbounce today and first thing that tripped me up was no auto-save! I *almost* lost more than an hour of work. I would have been choked. With auto-save being so prevalent in other SaaS apps, it’s almost assumed (for me at least) that all apps with editing capabilities will have auto-save.