Of course, I wouldn't rely entirely on one source of backup. We also do the 3 below except can be quite difficult given the amount of data we have. I always recommend the 3 Level Backup.
1) Onsite Local - External Hard Drive or NAS in the office
2) Offsite Local - Backup to Home/Other Nearby location or Rotating Encrypted Drive(s)
3) Offsite Remote - Cloud Service e.g. AC's backup or Ours or Carbonite
I always setup all 3 when doing an office. So we also help with your disaster recovery plan.
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