Unrefined ground dried stevia leaf can be quite bitter depending on what it is mixed into. I find it works well in baked goods like cinnamon rolls and corn bread, but makes berry smoothies too bitter to drink.

The refined version is much less bitter-- e.g., it works in berry smoothies (but, there is a very noticeable fake sugar taste/after taste with smoothies).

In either case, mixing with a little regular sugar (naturally occurring sugar content in e.g., berry smoothies is sufficient), generally improves the favor.

And, stevia does not caramelize like sugar when cooked. E.g., replacing most of the sugar in pancake/waffle batter will result in pancakes/waffles that do not brown when cooked.

I found one stevia brand with a 1:8 ratio (1g of stevia = 8g of Sugar i.e. 1:8 ratio). Found that too sweet for me and had a bitter aftertaste. I usually buy stevia with a 1:2 ratio (i.e. 1g of stevia = 2g of Sugar).

I use stevia in tea and coffee. Have also used stevia successfully to make cakes, cookies, and ice cream.