Perhaps the user segmentation for Linux users may be small, but for dual boot machines, you can
use it successfully.
Initially, the software will not see/browse ext3/4 partitions (since Windows cannot either), however if you install a service such as Ext2Fsd (you can check it out here: http://www.ext2fsd.com/
), the software WILL see and backup up those volumes successfully. Most EXT services are set for read-only tho, (the one I linked can be set to read/write).
Win7 x64/Ubuntu 14.04 LTS dual boot (separate drives for each install)
Used Volume Backup of Linux partition to external drive
Restored via FLR and Volume Restore.