I always taste their bottle before they have to check the temp as often although the bottle might feel warm the milk coming out of the teat is perfectly cool as its only a fine spray out of the teat.
I personally prefer hipp. It is now thought to be the closest to breastmilk and actually LOs nappies remained very similar after stopping BF at 4 momths and moving to forumla. They had terrible constipation issues with cow and gate, but the hipp has special stuff in to make their poo keep moving and remain similar to BM and really does seem too, so definitely will continue to use this afterBF any future children we have.