The Western Digital Lifeguard is OK, but no way is it as good as Ghost, nor does it do the same things. I recently replaced my 2nd HDD with a bigger one. I tried using the Western Digital utility to copy the contents of my existing 2nd HDD to the new one and I had problems. For some reason the Western Digital utility said it detected Windows NT on the drive. There is no OS on this second drive (XP Pro on the first drive and that's it). Because of this and that's it's NTFS, the only option I had was to partition this new drive into 4 gig partitions (would not set it any higher because it was mistakenly setting it up for NT. Needless to say I got the hell out of there and then used Ghost to do it. Ghost did not have any problems copying the drive.
I'm not saying the Western Digital utility is bad (I have used it before) but in no way does it replace Ghost.