Overall, I feel VaultPress is a solid solution, although there are other good solutions out there as well. The only item I can make a complaint about VaultPress is the fact is does not allow multi-site backups. I asked them about this a couple of months ago because as one who designs WordPress themes, I'd like a way to backup my theme demo websites (which are on a WP network (multi-site)) setup.

Unfortunately the only way I can do that is to get a subscription per demo site -- which would exponentially add up to a lot of cost. However, if I remember correctly from their response, it's something they are considering, to allow one backup solution for a complete multi-site backup; just no timeframe was mentioned.