I was recommended these by an allergy specialist once my eldest daughter grew out of her peanut allergy and they are great. I give them to my 10 month old too and she gobbles them up!
Ive used these for a while and like the smaller bags for childrens portions and things like American pancakes. Better than wasting a huge bag on a tiny portion.
Great size for batch cooking sauce and Ive even managed to squeeze 20 sponge cakes in there. I saw poor reviews for the ziplock but Ive not experience any problems with them so maybe there are less reliable batches or something.