I have only purchased this bottle once and my mum finished the whole bottle and she did recover well after the course of strong anti biotics. It contains an extensive amount of good bacteria and honestly, if it was cheaper, this would be something I would be interested in buying regularly.
These were recommended for my mum to take after she had a strong course of anti biotics.
They are expensive, compared to other products, but they are a bit one of a kind pills, so I guess thats what you are paying for. They do have to be refrigerated, just like the other reviewer mentioned, so you have to be careful about that.