I have been using pure protein isolate from www.allthewhey.com now for 2 months.. It is by far the best protein I have ever used.. It mixes instantly in water, milk, i like it in O.J . The price and quality cannot be beat.. It is pure protein no additives,,, I have been spending a sh*t load of money on MRP's, Protein etc and finally found the best for less.. And no I do not work for these guys they have the best product I have found... Please let me know If you a better source,, I have yet to find one.