We got the Coral 3 Stage due to concerns about water quality in our area. We decided on this model thanks to its great rating on the leading consumer reporting site. The kit was easy to install since I already had a spare hole in the sink for the new faucet. The only tools needed were a drill (for pilot holes for the screws holding the bracket for the filters), a screwdriver (to secure the filter bracket), and pliers (to tighten the adapter where it meets the the cold water supply line leading to the kitchen sink). Make sure to push hard to get the plastic lines to attach to the filter bracket. The bracket itself is well marked with labels for 'inlet' and 'outlet'. My wife has a sensitive sense of taste and smell and she is really pleased with the taste (or lack of taste) of the water. We plan to install another Coral 3 Stage in our travel trailer soon. Overall I recommend this model for anyone who wants to be assured of good quality drinking water.