Artificial Sweeteners?

One of the questions I'm asked repeatedly is about artificial sweeteners. Which is the best? Are any of them ok? 

I am cautious about them because they appear to raise insulin. Insulin is a hormone which turns on fat storage mode.  It triggers increased hunger, cravings and ultimately weight gain if as as result, you eat some more food.

Here is a recent post from Authority Nutrition on the topic.
http://authoritynutrition.com/artificial-sweeteners-blood-sugar-insulin/