Hydro-quad system

I have a Hydro-quad system I took from my old home (it was there when I moved in). I plan to have it installed soon (it is about 5 years old).

I am allowing a rainsoft guy to come over to test my water because I want to see the results (I am a home brewer and to get the analysis will help my recipes) They called before coming and not wanting to deal with them tonight I told him straight up I have a softener and filter system, have no need to buy a new one, Just built a house and have no money to buy a new one.. andthe only thing I would be remotely interested in is the air purifier. He still wanted to come test my water, and thanked me for being honest with him, told me he still wanted to give me the free test but not tonight as he wanted to send his salesman to someone who was more likely to buy and rescheduled for Sunday (odds are, I will be hung over from Christmas party Sat night)

I have been quite happy with the Hydro-quad and see no reason to change it out when all this one is going to cost me is for a plumber to install it. The company that sold it to the guy I bought my old house from came out and for $75 took it out, cleaned it dried it and boxed it for shipping.
Anyway what should I expect on Sunday?