Product review (4 stars): It works fine - eventually
After installing, I filled up several large cups of water to get the air out of the filter and lines.  If you have done this, you may have observed how while there is air in the system, water will continue to come out even after you've released the 'trigger'.  (Hint for any newbies out there: don't fill those first throw-away cups to the top; you'll get a good bit more water after trying to stop.)  After about a gallon or so, the spurts and burps that accompany the air bleed process ended, and that was that.  However, for nearly a week, every time we would get water, the valve would leak a little water after each use.  It slowly lessened, then quit, and has been fine since.

The opening for the water on this filter is considerably larger than the original from Samsung, and I suspect that perhaps due to that difference some air remained trapped in the filter and caused the ongoing after-use leakage until it finally purged.  Whether that was the root cause or not, everything's been fine after about a week's use.