Product review (5 stars): Great product I have actually repurchased
I had purchased previously purchased this filter from Fry's for about $39 until reading the reviews online and decided to try these.  Great product I have actually repurchased.  Definitely cost saving with easy install. You do not need to turn off the water supply to change the filter.  I haven't had any water leakage but you do have to make sure it is threaded correctly, rotated until it locks in places. I always put a paper towel down when removing the old one so the water is easily soaked up.  I always take a large pitcher to run some water thru to remove any carbon filter particles and then its good to go.  Then you simply press and hold the "Alarm" button for approximately three seconds to reset the filter reminder.  And the filter light activates on a time reference about every six months not if the filter has reached it's flow limit and truly needs to be replaced. You can tell when the flow starts to slow down, its probably a good time to replace.  Hope this helps.