Mount Pleasant is on municipal supply and the water is moderate, so this is a service we recommend selectively rather than as standard.
What people actually notice
Chlorine taste and odour is the common complaint, and a point-of-use drinking filter at the kitchen tap resolves it for a fraction of a whole-house system. That is often the honest recommendation.
Where whole-house earns its place
Homes with tankless heaters and recirculation systems benefit from sediment filtration, because those are more sensitive to particulate than a simple tank. If you have invested in that equipment, protecting it is reasonable.
We will tell you when not to buy
If you are on municipal supply with no taste or odour complaint and a conventional tank heater, whole-house softening is not something we will push. Summerville has a genuine hardness problem at 5.5 grains; Mount Pleasant largely does not.
Test first
Anyone specifying equipment without testing your water is selling from a catalogue rather than solving a problem you have.