I was in the smae boat about 3 months ago and had been an ATW customer for 6 years. Ordered NutraBio and they were just too inconsistent. I order 15-25 lbs at a time and NutraBio sent me 3, 5 lbs instead of the bulk bag (wastes of plastic IMO), when I called they said I was lucky bc I would have normally had to wait a week to get more in bulk, but they gave me the 3 at the bulk price. Problem was one tasted super minty (I love choc-mint), the other super choc, and the other a decent mix of the two. When I called to order more, the rep told me I was lucky they shipped it in 3 sperate containers (I'm not one to be told I was "lucky" when I'm spending well over 100 bucks with you), she understood there was inconsistencies and she had heard of it before, but not in "that batch". Didn't offer to send me a sample of thier current batch or waive shipping (you can get free shipping if you pick the RIGHT auction to buy it from and if you don't and you call in, they will tell you they are sorry, pay for shipping and piss up a rope [albeit the shipping is cheap). Needless to say, I ordered twice, burnt twice, won't order from them anymore.
Now I use American Pure Whey and have been very satisfied. I just saw a promo code for 20lbs for around 122, right now I pay 130 so I will as my rep tomorrow if he will honort the 122 price with the code. I'll post when I know. It is Isolate as well.