My experience with Queal has been good so far. The most positive experience is that it has most of my meals feel easily prepared for. I like that it actually tastes something and that taste is not something chemical but more something that feels natural. I love the fact that I can have meals which contains the protein I need (athletic version) as well as vitamins and minerals. Accomplishing the same thing with my own cooking would take a long time and would not be as consistent.
What I believe can be hugely improved is the shaker. The shaker is a bit small and after I've finished a meal there's always some small powder traces stuck to the inside of the bottle. Since I don't have dishwasher that is kind of annoying to have to put the extra effort into scrubbing it off inside the bottle. I would say a more classic design of the shaker would probably make a big difference.