We use Cow and Gate and lo has had no problems with it. From listening to the experiences of friends and family this was the overall picture of the formula brands:
Aptamil Pros= poos are like bf baby, supposed "higher quality" ingredients, sweet tasting.
Cons= Expensive, babies can be a bit sicky on it as it is apparently quite rich, doesnt come in larger ready to feed cartons.
SMA Pros= Very popular, well known and trusted brand, available everywhere, babies generally like it, powders are vegetarian.
Cons=Can make babies constipated due to higher iron content, does not contain LPCs, expensive.
Hipp
Organic Pros=Organic, has a thinner consistancy closer to breast milk, supposedly tastes the most like breast milk, less expensive than other brands.
Cons= Not a very well known brand, not available as widely as other brands, not available in hospital bottles, not available in larger ready to feed cartons.
Cow &
Gate Pros=Well known long lived brand, cheaper than other brands, babies tend to stomach it well, available in larger size cartons.
Cons= I have never actually heard any friends say a bad thing about it, but im sure some babies will be windy or sicky with it etc.