I have bought Metabolic Drive (and before that Low Carb Grow!, and before that Advanced Protein) pretty much exclusively the last few years. I recently bought some Infusion, manufactured by SAN when Metabolic Drive was out of stock for a long time. The quality seems very high.
On his website, Charles Poliquin says he uses it with his athletes. I love the ingredients and nutrition profile. The taste though........not so great. It will get me through until Choc and Vanilla Metabolic Drive are back in stock.