Yep, used the infantis when DS was first born as I had a very protracted labour, and good friend (who is an amazing Oz naturopath recommended) cannot remember actually if that's why............. [hmmm]
and then have the banana one around now. Keep meaning to give it regularly as it's supposed to help with allergies.
Also used their adult Travelguard whislt I was in the desert in March doing big trek. Serious tummy bug went round, didn't touch me.
Good luck!
J
x