3M Aqua-Pure AP910R Whole House Water Filter Cartridge Replacement for AP902 System | Sanitary Quick Change Design | Clean Water for Drinking, Showering & Appliances

I own this and got it installed about 3 weeks ago.I have city water. I did testing beforehand and saw that my tap water was high in alkalinity and calcium. I had a plumber install the full version of this filter that includes the descaler. Plumber had to cut open a hole in my townhouse garage wall. $1,400 for plumber. Great result though with very nice looking piping, very discreet and right up against the wall. The water was immediately noticeably better, after a 5-10 minute flush of the filter. Even though it is just a water conditioner/descaler rather than a softener, it has a significant softening effect. The chrome and glass in my bathrooms have already improved a lot in just a few weeks.I would say the water smells, tastes, and feels 80% better. Super easy to change the filter, so no reason this won't work perfectly for 20+ years. They could possibly even upgrade the replacement filter cartridge design in the future.It did reduce my water pressure 5-10%, not enough to care, but that was probably partially due to the loop in piping my plumber had to make. It does seem like the water pressure has improved a little recently though, so it is possible the descaler has helped increase the diameter of the piping throughout the house by loosening up some of the lime buildup in the pipes.It is most noticeable when just washing your hands. The water has a slightly slippery feel like a water softener, although only about half as slippery. I think water any softer feeling than this would be overkill. My plumber said that his company usually rebrands a nearly identical water filter to this and charges over $1,100 for it, so this is a great deal comparatively.Hard to imagine really needing more filtration or softening than this. I wouldn't waste the water pressure or time or money on a prefilter for this if you have city water; just replace the filter every so often. Over the years, it probably pays for itself at least halfway due to the increased life you get from your water heater, dishwasher, clothes washer, toilets, faucets, and fridge.I rate the overall effect and quality of this product a 9 out of 10.I still use a Brita for my drinking water because I didn't want to just throw it out, and it seems like this filtered water going into your Brita makes your Brita filters last way longer if you still want to use that.