Oh, I love "Carbonite" (amazingly, George Lucas isn't suing over whatever infringement since everybody will think of the star wars movie where the hero was encased in it for protection, but whatever...) -- see, the CEO gave us his emotional shlock about his daughter and unsympathetic professor. Without telling us what degree she was studying, or why she didn't make backups... or if she knew HOW to make backups. His emotional drivel isn't compelling me to buy into his service.
Using buzzwords like "promise" turn me off because everybody makes promises and everybody betrays them.
And their ToS is really hard to find. If I am putting up money, I want to know the details. People have been facebooked enough in terms of what they don't realize because they don't read the ToS. The fact both companies presented hide their ToS, rather than putting it as an easy-to-find link upfront, does not engender confidence. Their FAQ answered nothing of pertinence here...
For $149/PC/yr, I could buy a whole 2TB hard drive. Most people don't even need half that...
I wonder what DMCA regulations that these companies have to work out. If people are backing up songs, doesn't that outright violate the DMCA?

If not other such laws... I know, get rid of that and I bet a lot of other small businesses providing cloud services would crop up, and at costs far more affordable than an outrageously expensive $149/yr. Okay, $149 is Windows-only and top of the line, but it's interesting that each package's title doesn't have a clickable link to get to the details... and why does only the lowest-end package support Macs and none of the higher ones? (yes, there is a "compare" button, but a more instinctive approach would be to enable the link in the headers, rather than putting it in comparatively tiny text on the lower-right corner of the box...)
I could write questions all day...