Western Digital Black² Dual Drive Review – Two drives in one! @ TechwareLabs
 

With prices continually falling, SSD drives are no longer a luxury for the enthusiast. There is no doubt that SSD drives have significant advantages over their spinning brethren, but pricing aside...capacity continues to be the SSD's Achilles' heel. The current defacto solution to this conundrum is to pair your shinny SSD with a large capacity HDD. This pairing allows the user to decide how to handle their data management needs, performance or storage capacity. This works for most PC users, but in cases where design limitations prevent the use of two separate drives, the user is unfortunately forced into decision between one or the other. Will you ever be able to have your cake and eat it too?

http://www.techwarelabs.com/western-...drives-in-one/

would not want to install this into a laptop as the only drive.
while the set up is nice (SSD OS, HDD DATA) the fact that the two form one device means if the HDD or SSD fails, you need to replace the whole $300 shebang. Not such a good deal in my humble opinion.
also no way to back up the OS SSD to the HDD partition, as they are both one.

make it a hybrid drive with 128GB SSD cache (instead of those 8Mb versions out there) and it might stand a better chance in my humble opinion :)