I used to buy Natrel all the time for me and my kids, however i have boughten a few bags that just dont taste right. Its not that its sour, it just taste almost metallic. When I got a good bag (which was most of the time) I did love the taste of it. Also it is too expensive when Neilson is $1-$2 cheaper. My kids drink alot of milk, so when I can save on milk, i take it!