Simple answer – Backupbuddy is idiot proof. I use it for all my client Web sites that purchase a maintenance plan which includes scheduled backups.
Now the boon for me is whenever a client wants something changed on their Web site, I use BB to create a most recent backup, download the archive and install to my local Linux server and now I have a test version I can muck up. I do not delete the archive as suggested during the BB install though – this way if I screw up some modification, I just delete the extracted site files and re-run BB.
And on average BB updates all the URL’s 99% of the time. Rarely do I find a local URL on a remote site. I mention this because I used to use relative URL’s for images and such, but with BB I strongly suggest using absolute since BB will convert these automagically.