I've had the EZPZ plugin on for a few versions of wordpress because it seems to be the only plugin capable of sending an archived version of the site to dropbox. Unfortunately it is plagued with problems:
-Support: I've posted questions to the author's 'support' section (comments at the bottom of the EZPZ backup page) and it just remained "awaiting moderation" and eventually just disappeared.
-After a few weeks it stopped sending backups to dropbox at all, but i didn't receive a specific warning, just noticed that the "backup complete" emails stopped arriving
-The DB backups were empty, just 16 lines of comments and nothing more!!!
-Eventually fails completely and results in a "No Results Found" page when using EZPZ admin
This could be a great plugin if these huge failures are addressed, but until then I'll look elsewhere.