I really like these bags. At $10 for 50 bags you cant beat it.
They are the only bags I feel confident in saying they are leak-proof, due to the double zipper seal. Other bags you seal by folding and securing with a twist tie.
They are BPA free and come pre-sterilized. Which is great because that is one less thing I have to clean. And that is huge because these days ever minute counts.
My favorite part of this product is, they way the bags are designed they can stand when filling...kinda. They are a bit flimsy but again compared to others it makes them easier to fill.
I highly recommend these.