Yah, i've tried the VP2. It is definitely a low calorie high quality
whey protein isolate shake. So if that is what you are after, then go for it. I used it off and on as part of my pre-contest diet...when I needed a quality protein that was low in cals and could mix easily in a shaker cup. It all depends on what your goals are I think. If you don't care about whether it's a pure isolate or not, and if it's low cal or not, then go for the ON. I do believe VP2 is a good product tho and it tastes pretty good as well, so drinking it is no prob.
ON is prolly the best all around protein product you can buy though...as it has isolates, and other types of
whey protein fractions in it. You pay more money for a pure isolate whey protein like VP2, compared to a mixture of protein blends like ON. Hope this helps.