I use Syntrax Nectar Medical. It is the only reasonably priced protein that is unflavored and most importantly, unsweetened. I hate artificial sweeteners and I detest stevia.
I mix it with 2 tablespoons of real full fatted Brown Cow Cream on Top yogurt and a quarter cup of non-fat dryed milk. Delicious and not too sweet. I would rather adulterate my own protein thank you.
I also have to supplement it with plenty of liquid vitamins as it has no supplements in it.