For quite a long time I've been trying to research probiotics to help me decide which brand might be a good one, but there are so many variations out there that it's too hard to decide which might be the better ones. Plus there are quite a few factors that one has to take into account, such as how many billion CFU there are in each capsule or tablet and what species or strains it contains. I would really appreciate if you are able to share your experience of probiotics you may have used, and your thoughts on choosing a probiotic. Currently I was thinking of ordering this or this or this. What do you think?