Old water softener died (we have terribly hard water here in west central floriduh), it was one of those all-in-one models made by a company, sold as various brands (GE, Rheem, Whirlpool, depending on the big box store one purchases from). Resin leaked into house plumbing, PITA to flush out from all fixtures and from the fridge's water lines.
Ordered a new one with separate resin and salt tanks, friend recommended, reviews are good, and he self-installed at his home. With his help, installed the new one. Assembling the unit wasn't hard. My nemesis is plumbing, but buddy is very good at layout and connections. Built my confidence from his sanity checks and advice.
Going to get WS salt today, and perform initial setup tonight, unit is currently in bypass mode with no plumbing leaks (fingers crossed).
Box store mistakenly sent me the model which comes with a whole house filter, so I'll self-install this in a couple of weekends. Not a priority, but hey, free is free, and no point keeping those parts unused.
Also have to install a reverse osmosis system in the home for drinking water. Something wife wanted for a while; got it for ~40% off with sale price and box store gift cards via employer rewards system.