I love these bags...they cost a bit more, but for me are well worth the price.  I like that they are not overly thin, and I don't feel like my hand is in the poop, when I use these bags.  I have never had a bag to tear, have a hole or rip at an inopportune time. I truly like that they are biodegradable.  Their expiration date is generally one year, so I can only stock up so many at a time, but that's OK.