I got the basic 4 stage BRS unit ($130 bucks or so) due to higher phosphates/chloramines in my tap water and I didn't want to make weekly trips to the lfs for water.
Since I'm in a warm climate I just carry it out onto the back patio and connect it to the hose bib each weekend or so using the screw on hose bib connection that comes with it. Just like hooking up a garden hose. I set my 10gal salt mix bucket next to it, drop the blue RODI out line in it and turn the water on for couple of hours while I'm doing other things. The black waste line gets tossed out into the grass/planter to water it.
Then I'll fill up another 5 gal large container for top off water and put it away.
Beginners get overwhelmed watching videos of installing them it into your plumbing and sewer lines with float valves etc vs just setting it out next to a hose bib as needed and filling up a bucket. Yea, eventually you may want to integrate it inside if you're doing 30-50+ gal changes, but not for first timers and smaller amounts IMO
If you're in an apartment etc there is a sink connector that slips on just as easy and you can just set the waste drain hose into the sink.
wow thanks! thats exactly what i was dealing with. these videos made me panic.. i appreciate it. I am going to look into this unit.