All reflux meds work for some people, but not everyone, so it's sometimes a case of trial and error.  IMO the omeprazole capsules are easier to use for babies - Reuben used to get half the contents of one floating on a teaspoon of water dropped into his mouth - if there's no history of allergies then mixing it with a tiny dollop of pear puree works best.  The biggest problem I know with the suspension (apart from having to pick up a new lot from the chemist every week) is that it tastes so vile, I think the baby might prefer to just put up with the reflux!  Serious - give it a taste!  It's designed for naso-gastric feeding rather than oral.  But if it works for your little girl, horray!!!  I don't think it's less effective than the granules.