Here's a little bit about other full disk encryption options that I looked at. I'm no computer security expert, but this is sort of a high level overview from what I remember.
Truecrypt 7.1a - Last real version. (AFAIK) Open source, different encryption options (AES Twofish Serpent), option to encrypt containers, partitions, or whole disks. Encrypts free space too. Takes ~16 hours to do 1 TB on a HDD. Works fine with SSDs, HDDs, external HDDs, and USB sticks. Works on Windows and Linux operating systems. (So if you dual boot, you can still get into your shit.) Uses it's own bootloader for full disk encryption, so I don't know how that works with your GRUB windows/linux/mac loader.
* Does not work on GPT partitioned drives, as mentioned above. Windows 8, I believe, is GPT partitioned by default. Also there's the detail that it was developed by some anon, who seems to have been partyvan'ed.
Truecrypt 7.2 - Bullshit decrypt only version. (Do not use!)
Cyphershed - The spiritual successor to TC with a stupid name. Last I checked, they're 2 weeks away from a release, 5 months ago. Developed by some Swiss fuckers, or something like that.
Symantec PGP Encryption - Closed source, costs money, my work laptop is going to this. Seems ok. Except that it's closed source, so there's no way to know if it's backdoored, and Symantec is shit. (Their anti-virus program drags my work laptop down to Pentium 1 windows 98 emulating a playstation 1 kind of load times.)
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