I've been using the under counter 3 filter Aquasana system for nearly 20 years and feel it's one of the best investments I ever made. From the very first cup of coffee made with the filtered water that was an eye opening WOW moment to now having the system installed on my boat, which saves carrying cases upon cases of bottled water along with the hassle of dealing with the constant empty containers. It's not just how much better drinks and food prepared with it are, it's the quality built in to each unit. As heavy duty as I've ever seen anything of this sort made. It's absolutely built to last.
Pros: Clean taste, Long lasting filter, Durable, Easy to install