I have the sugar-free jell-o and cool whip quite often. That's my sweet treat. I HAVE to have something sweet. I have yet to have it affect me in any way except to curb my cravings for other sweets that I simply can't have (like that box of girl scout cookies in the pantry!). I haven't tried the stuff in the can. Hmm. mebbe I should. I know there is a low fat cool whip, but I've never seen sugar free.