Product review (1 stars): DO NOT BUY!!!  YOU'VE BEEN WARNED.
I will never buy another Samsung appliance again.  I bought a RS261MDRS months ago.  It hadn't been 2 months after purchasing and my refrigerator starting making a buzzing/vibrating noise when dispensing water.  Also, the water flow has slowed down tremendously.  I bought one of these filters hoping the problem would go away. It helped for like a week and regressed back to the previously mentioned problem.  I called Samsung support since I have a year warranty on my refrigerator and they refuse to service it claiming that I have a defected water filter which has no warranty.  SO IF YOU BUY THIS FILTER, YOUR GOING TO BE SOL.