@Ibby114 I was coming back to add that to me, non-GMO is also a consideration and saw your post. I think it depends on what each individual is looking for (and what ingredients they might be sensitive or allergic to).
Personally, I use it more as a snack/treat. So healthy, good tasting and low calorie is more of a priority. I tend to eat quite a bit of protein anyway, so I'm not particularly concerned about that. Even if I was actually using it as a meal replacement, I'd still prefer the vitamin/mineral content of the Secure. I'm lousy at consistantly taking supplements. Even with added fruit (or many other smoothie ingredients), the total calorie count would be around the same (or maybe less) than the Costo powders, with considerably more nutrition.
As far as stevia, I remember Andrew Lessman responding many years ago that he had looked at stevia, but (something about) he wasn't comfortable using it in the quantity that would be needed. Wish I could remember more because I do feel he does really research his ingredients, and more importantly, has the knowledge and ability to do a reasonably decent job of sorting it all out.