Product review (5 stars): This is the one you should buy!
After reading the reviews for this product and the equivalent Aqua-Pure product, I decided to buy one of each and do a side by side comparison. The first thing I noticed was that the Water Sentinel is made in USA, while the Aqua-Pure is made in Mexico. The Water Sentinel appears to be better constructed and heftier. It also includes 0-ring lubricant, which makes installation MUCH easier. After flushing a gallon of water through each, the taste test was pretty much the same, the Water Sentinel maybe a bit better. Considering that the Water Sentinel is about half the price (and did I mention MADE in USA), it certainly seems like a no-brainer.