Thanks for a great backup plugin.
Installed and had it working in a couple of minutes. Absolutely love the integration with Dropbox (and other online storage sites). Setup is for people who actually understand how to use the web, though it's all pretty straightforward and the defaults will work fine for starters.
Only comment is that a note needs to be added to alert people NOT to use the default WP directory for the backups as it will lock them out of WP. I'd suggest making the default backup directory called 'backups' in the WP root directory.