I'm a new Carbonite user referred there by
Chris Pirillo's blog and wanted to share some things here for the people who may be considering Carbonite.
I have about 130GB to backup. Admittedly, this is a huge block of data but Carbonite advertises themselves as "unlimited" and shows 40GB on their homepage. After about 5 days of backup, I got an email from Carbonite telling me "Your account has been disabled temporarily. You must either reduced [sic] your pending backup size so that it falls below 100GB or cancel your account."
I did neither but emailed their support with my concerns regarding the
vagarities of the TOS (previously mentioned in this thread) and advertising and asked them if there was a second tier plan. I haven't heard back. My backup continues.
Which brings me to my second point - speed. I'm a Fiber Optic user and get very high upload speeds but have been disappointed by Carbonite's speed which to my mind does not take advantage of available upload bandwidth. I'm 12 days in of nearly continuous uptime with minimal interruptions, and only about 30% complete.
These things being said, I LOVE the interface and the concept is awesome. I have never seen anything simpler for backup and I sincerely hope that they can work out the business to meet all customers' needs. I paid for my year today despite the earlier email and I guess we'll see what happens.
I'd definitely recommend Carbonite to family users who need simple, no-hassle backup and hope that they can find space in their model for users like me.
See also
this guy's experience and
this other post by another guy