Product review (1 stars): Would not flow water in Samsung refrigerator.  Pay more for the real deal.
Filter refused to flow any water whatsoever, and when removed it would eject dirt/carbon.  I made several attempts to re-install before putting the old filter back in which worked fine.  The water sentinel filter easily installed and appeared to seat properly, but simply it would not flow any water at all.

It's likely a defective/damaged unit but one problem is too many and I'll just pay more for the genuine Samsung filters from here on out.  For a $2,000 refrigerator it is probably worth an extra $10 a few times a year replacing filters to get the real deal and not a knockoff.  It's worth saving the aggravation of any problems, plus as others say it appears the Samsung filter is a larger, more efficient filter which screens more particles than the water sentinel.

Amazon did accept the return and issued a refund promptly, so if you'd like to take the risk on the water sentinel filter you can always return it if it doesn't work out.