I've tried every Protein recommended, and finally found one that mixes easily, tastes great, and provides a good amount of protein. It's called TLS and there are 2 varieties at this site: http://www.forbariatricpatientsonly.org/
I use half the recommended servings so it is very economical, and I also add in MochaTonix for great energy (again, only half a serving). I drink this every morning and it holds me until lunch most days. When I need more protein, I add a scoop to some decaf coffee. Healthy yum!