I totally concur. I've got SD running at work, home, and family member's homes as well.
I can't say that I've run across anything that compares in reliability and ease-of-use.
I used to run a 400+ node backup of Mac desktops nightly using Retrospect - this obviously can't replace that setup, but this is hands-down much better on a case-by-case basis.
Superior software and support - I think I'm officially a salesman now...
SB