Riplock and region free are entirely different things. What I have seen of this drive suggests there is Riplock just like there is with most drives which don't have a firmware patch to remove it. Just because one person questions whether there is doesn't mean that the drive isn't Riplocked.
The price is the most attractive feature for that drive but for ripping I don't think it's the fastest available. I don't own the drive so I can only post what I have read.
I think that deanwitty on this forum who posted to my thread about Blu Ray scanning might own a Samsung drive so he might be able to confirm whether it does have Riplock. He has a different model but suggests that all Samsung drives have Riplock. Not conclusive by any means but from everything that I have seen and read, it does look that way. By all means prove this wrong if you can but as a Ripper, I don't think the Samsungs are the best option.