Likewise wouldn't be without our water softwner. Better skin, better hair, no limescale, minimal chemicals needed for cleaning, minimal amount of detergents needed for laundry.
On plumber's advice we went for one which takes block salt. Much easier to manage 2 x 4kg bricks of salt than 1 x 25kg bag of pellets. We get 10 x 8kg packets delivered every 6-10 months for a household of 5.
I chose to exclude the kitchen cold tap. I have several relatives with high BP and don't want them worrying whether it is safe for them to eat or drink in my home. Also, research shows lower incidence of certain medical conditions (heart disease and bowel cancer, IIRC) in areas of hard water compared with areas of naturally soft water. Only statistical, and cause has not yet been identified, but decided to stuck with ingesting hard water for the time being.
The unit is very heavy, so place it where you will not need to move it. It can be moved, slides easily across the smooth cupboard base, but not something I would choose to do.
Maintenance is important. I haven't heard anything about cleaning it internally, but plumber pointed to the overflow and stressed that if ANY water comes out of it I should call him immediately.
It's ages since I did my research, but IIRC you can get electric softeners, which don't need salt but cost ££££ (and need to be powered, of course), non-electric, salt-fed (like mine, which automatically refresh themselves once a certain volume has flowed through, so once every day or two) and electric ones that also use salt.