Obviously the water quality in that it is tastes better and there is no smell to it. I have a service plan that once a month checks the water quality, adds salt, etc. and all I have to do is turn on my tap for water.
If I would like to see any change that would be where my monthly bill could be taken out of my checking account. Outside of that don't change.
Water delivered monthly is great, and if there is a problem Culligan fixes it and life goes on. Love that when my water is delivered, my bill appears so I can promptly pay it. Have been with them for a long time and few minor problems that were easily taken care of quickly. Thanks Culligan!