Used to love your plugin, but the last few versions have been really unreliable.
Most of the time they just timeout (after running some hours), or restart multiple times, but other times I've come back to an unresponsive server because backwpup has filled an entire 20GB drive (while backing up 1GB of files). Worse, somehow it's managed to upload 100+GB files to S3, costing me extra fees I didn't anticipate. How it manages to upload 100+ GB (one file was 227GB) from a disk which can only store 20GB max is beyond my imagination.
I would become a paid user if I had any confidence that the Pro version would work better, but I assume it would have the same issues, and I've already paid quite a bit to Amazon for those large files that I didn't notice the plugin created until I got my bill a little while ago.