The main complaint I've had with Clonezilla is what a pain it is to mount an image and restore individual files out of it. From what I recall you were stuck backing up partitions by themselves if you wanted to later pull individual files, but this was a pain if you ever wanted to redeploy the machine back to hardware.
The easiest time I've had deploying / backing up workstations was simply just a full-tower windows machine with multiple hot swap SATA bays using Ghost for images. Regardless of image machine OS and software I'll take backing up disks over SATA over network cable any day. If the computers don't have fast release hard drives I'd just buy a good power screwdriver.