Every flea treatment product has advantages and disadvantages, making it important to understand what your goals are.
Cheristin does kill fleas quickly, starting within 30 minutes and killing nearly all of them within 12 hours. This makes it comparable to Frontline GOLD and Advantage II for cats.
However, killing adult fleas is all it does. Products like Frontline GOLD and Advantage II that also target flea eggs and larvae may help to end a home infestation faster and more completely, especially on multiple cats.
If your kitty has exposure to ticks as well, Frontline or Advantage II would be better to use with their broader spectrum of action. If your kitty lives in an area endemic for mosquito-borne heartworm or may be at risk for picking up some intestinal parasites (especially outdoor cats), Revolution, Revolution Plus, or Advantage Multi would provide better coverage.