Product review (5 stars): Exponentially better than the knock-offs.
I've used one of three and it's worked like a charm. Reading the reviews of the knock-offs, many people complained of leaks with others saying you need to disconnect the water supply. I've pulled and replaced the name-brand filter 3 times now without turning off the water supply with no ill effects. These are also rated to remove lead from the water while the knock-offs are not.