The great advantage of Corsodyl is it's substantivity in that it will remain active in the mouth for longer periods of time, and is still thought to be the 'gold standard' for mouthrinses in the treatment of gingivitis.
However it is not to be used as a 'daily' mouthrinse, only for short concentrated periods when there is a specific reason for doing so. Overuse can result in staining if teeth, taste disturbances, parotid inflammation and sadly recent cases of anaphylaxis.