I managed to install on my own - without help or needing to call for help. If you buy one, watching a few related TouTube videos is helpful. The water tastes fine. The only reason I give it only three stars is that it provides a very limited supply. After jumping all these hoops, the water comes in a thin trickle that makes it an exercise in endurance to fill a cup - let alone a teapot. Once you get approximately 4 cups of water - you have to wait 2-4 hours before the pressurized tank refills. With patience and careful planning you could manage. However, for a family of 5 is not sufficient. We collect water now at regular intervals for later use.
We got tired of hauling fresh drinking water to the lake every weekend so we invested in this filtration system. We have been using it for a month and a half so far and works great. The lake water is brown from tannins and minerals, the result out of the system is clear great tasting water. Installation is a bit of work and you need a power source for the UV treatment, took about 4 hours. Don't expect a lot of water as it is a little slow but enough for 6 people's consumption, not washing dishes and such.
Lasted less than 2 years with moderate use, one of the tanks just cracked and exploded flooding my whole kitchen, dont wate your money, home depot wont back you on the product either once you pass the 1 year manufacturers warranty.
The installation of the unit is very easy if you ignore some places in the instructions in the manual, where better clarity can be improved. So far the unit has been working fine and up to my expectations. Manual and instructions can be improved for clarity. Tank physical measurements are hard to find before purchase decision is made. This information is critical when deciding if the tank will fit the space under the sink.