Hard Disk Encryption – HP Drivelock vs Windows Bitlocker

We have all HP equipment and for the last few years I have used Drivelock to protect (encrypt?) these drives.  I have concerns that drivelock is not true drive encryption and debating if we should switch to using Bitlocker, we are starting to roll out windows 7 enterprise.  Has anyone had any experience with using Drivelock from HP/Compaq?

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Solution: Hard Disk Encryption – HP Drivelock vs Windows Bitlocker

DriveLock doesn’t encrypt the harddrive it only locks it with a password which is an excellent way to annoy thieves – they may steal your laptop but cannot start it or access your data.

If a DriveLocked drive is connected to a computer that does not support drivelock then the data can not be accessed.

I would complement Drivelock with some form of full disk encryption if the data is that sensitive.