I have a 1 TB Essential SE, and saddly I must say I am thinking of returning it simply because of the stupid "virtual" CD drive it makes.
Windows 7 had no problem installing the driver or service "needed" to use the drive. But ummm, my friend needs diffrent software to use the drive on his XP machine?? It says on the box (on the top, hard to see) "Formatted NTFS for Windows XP, Windows Vistia (*shutters*) and Windows 7". Ok no problem.
It DOSEN'T say that it NEEDS to install the extra software to even use the drive. If I would have known that, I would have gone with a diffrent brand! Sorry Westren Digital, but you really dropped the ball on this one. I paid good money for this drive, it was a bit exspensive. Sandisk flash drives have password protection software on them, but it is very easy to remove the software and isn't required to use the drive.
And as to lack of Linux support, pppfffttttt. You should make it clear on the box that your "Essential" drives not only offer no support for Linux, but it's almost impossable to use it with that OS! I can't find any drivers for it on your website. Sure, allot of hardware says it is "Windows Aproved" and such, but at least I can plug it my Linux box and it will run. This drive isn't "next generation" at all, it's just another periphery device. If it was, you wouldn't restrict the usage of your hardware to just two OS's, owning there are many other (and growing) options to Windows and Mac OS.
Linux can read and write to NTFS drives with no problem, but not this one. I can't even "unlock" it. I could reformat it apprently to use it with Linux, but that would destroy all my data now wouldn't it? But owning the software is built into the drive (including the "unlocker") I still wouldn't be able to use it even then!