The Rohl-Perrin Tri-flow is a nice unit. We only installed it about 30 days ago, but it works great and looks good; client love the idea that the filtered water is built-in and still only a single spout and it priced out comparable or less than a faucet and separate water purifier with spout. The only complaint was the install - relatively easy and straight forward, just with the filter system it needed more clear height than we had under the sink due to the sink being a 36" single stone sink - guess this might be more of our design issue than the mfg's issue.
— Ron