Pretty good deal in my opinion. Good quality Protein and good reviews.
Seems to be the whole range on special at Silverdale currently.
If you want you can use Chemist Warehouse Lowest Price Guarantee and get it 10% of the difference.
Lowest Price Guarantee:
At Chemist Warehouse if you find a cheaper price on the same item at another New Zealand Registered Pharmacy or New Zealand Retailer with a physical store in NZ we will match it and give you 10% off the difference.
The price matching policy is limited a maximum quantity of one of each product.
Link: https://www.chemistwarehouse.co.nz/buy/62726/musashi-high-pr…
Pretty sure CW, doesn't do a further 10% off, only 10% of the difference in price between them and the competitor.