Advice on Primal Defense

I bought 2 bottles of this pricey probiotics after having read of the many benefits of this only to be discouraged by an article Consumer Reports did on probiotics and found that Primal Defense, when studied in an independent lab hired by Consumer Reports, had very low levels of probiotics strains. As a matter of fact, the levels were much lower than what the bottle stated it had. Can you give me advice on a really good probiotic?
How can I tell if I have a quality product or not?