I have been using Mozy for about 4 years, and continue to be pleased with the service and cost. It has a very low profile on my computers, and has never gotten in my way or reduced my system performance in a noticeable way. When one of my laptops died, I was very happy to have the full file system backup available, making the transition process to a new laptop much less stressful.

The reason I give this four out of five stars is that Mozy is behind the curve on developing web-based access via apps and a web login to access files. They have finally come out with their initial offering in this space, but I am so used to Dropbox by now that I am not terribly interested in switching over. Primarily because Dropbox integrates with so many other apps, and Mozy does not. If this changes in the future, I would be happy to shed the $100/year cost for Dropbox since I already get this service with Mozy, but they need to get to work on their integration landscape to be competitive.