As a long-time supporter of the B-B-B method and having recently added an SWCG system Ben is spot on:
SWCG is incredibly convenient if you cannot be there every day or every other day to test and adjust the chlorine in the water

BUT

On a pure cost basis testing and adding bleach or Liquid Chlorine is far less expensive.

I only installed an SWCG this year because I AM planning to be away for long periods of time and it works extremely well.

Both SWCG and B-B-B are totally compatible with each other and once it's not a "choice". You can leave your SWCG system off if you want, or replace the cell and use it again.