best free backup software

Just download a free backup software from download.com, named easeus todo backup, I want to say this is the best free backup softwasre that I have used.

advantage:
nice GUI
completely free
easy to use – just several mouse click
support all PC and server machine
support raid array
besides backup, it can clone disk to migrate data
even provide winpe bootable disk

disadvantage:
cannot backup a single file

worth to own it
http://www.todo-backup.com/products/features/

Did anyone use this SW?
What do you think?