[javajosh]

Dropbox disagrees with you: https://www.dropbox.com/tour/4

Note that I've been using DB successfully as an up-to-the-minute backup since it came out - it's only in the last week I've had problems bad enough to go back to my weekly backups.

[res0nat0r]

Four out of five doctors agree that X is great also. Does it matter what their marketing speak says?

Auto replication to the cloud isn't a proper backup plan, unless you are counting on noticing any missing data within their 30 day backup retention policy (if you are only using their free tier) and restoring your missing data before it is automatically purged.