I have NIDO whole milk powder stored. Got it at Walmart several years ago. I cannot find the exact one I have there now, at least in the Kietzke store. The one I have is basically just whole milk powder, not the specialty items for different age children.
I use Parmalat as my primary daily use milk, as well as a storage item. It is one of the items I rotate on about a six month basis.
It is hard to find the Parmalat whole milk now, though the 2% is still available in the Kietzke Walmart most of the time.
I really love the Parmalat whole milk. Not only does it store well on the shelf, but keeps extremely well refrigerated after opening, too. I can honestly say I have not had any of it go bad, even when kept more than three weeks opened in the fridge.
Just my opinion.