Advantages: 

It is a completely natural non-synthetic product;
steviol glycoside (the sweetener) contains absolutely no calories;
the leaves can be used in their natural state;
thanks to its enormous sweetening power, only small quantities need to be used;
the plant is non-toxic;
the leaves as well as the pure steviol glycoside can be cooked and used for baking ;
no aftertaste or bitterness at optimal dosage;
stable when heated up to 200 degrees;
non fermentative;
flavour enhancing;
clinically tested and frequently used by humans without negative effect;
ideal, non-addictive sweetener for children;
shelf life of years;
can be mixed with other sweeteners with remarkable enhancing effects.