I always had trouble not being able to fit what I needed into the sandwich bag sizes and not wanting to go and buy the gallon sizes so the XL bag works perfectly !
I love the easy open tab on these bags. Sometimes it is just hard to get them open...if your cooking your hands can be greasy, tiny hands are unaccustomed to opening them, etc. So it's nice to have that option when you know you will need them. Also, they're good for organizing. You can write on the tabs for an easier way to see what's in it if they are stacked! The bag itself is the same durable bags I expect from Ziploc.