We've been using the Aquasana for about 3 years now. It's been good but we're not big on the fluoride in the water. We were on an extreme budget so this was the best for us as far as money-wise. The water tastes great. I have a hard time installing it probably because I'm super weak so my boyfriend always has to do it.
We get replacement filters through Water for Life, and they are always prompt and perfect. The filters take a little while to install- typically 15-20 minutes, but they last 6 months.
Pros: Clean taste, Durable, Easy to clean, Long lasting filter