I purchased the Amino Z brand Chocolate WPI protein in 3kg in a spur of the moment decision, since my supply was running fairly low. I've got to say for the price I've paid for it. I'm very happy with my purchase!
Packaging: They sent me out 3x1 kg packets which makes managing shelf life of the protein that little bit easier manage in comparison to other brands that just give you one big container/ packet for it.
Taste: The Chocolate flavour for me, tastes pretty good, and is certainly up there with some of the better tasting ones. Instead of like those brands that just taste like you are drinking burnt chocolate coated cardboard.