If you follow the Basic Steps and Backup your Encryption Key in a safe place you shouldn't have any problems.
If you are using the Trial Software available remember it is only a 30 Day Trial so you need to remove it before it gets crippled and your HDD becomes unreadable.
With any product like this you need to perform a Full Backup before installing and write down the Encryption Key and keep it in a safe place. If you forget what the Encryption Key is you will be unable to access your Data again. This happens a lot with M$'s EFS. You also need to backup any Data without Encryption as this software may not be suitable for your Next computers OS and if that happens you will need to activate an existing working copy of the software so you can recover your Data to transfer it to a new computer.
This Really Basic Stuff is very often overlooked and causes the Loss of Data.
Col