These slider bags are fantastic. They are super thick so are good for the freezer. I like the longer length much better than quart size bags. The zipper part works well. Two seperate bags (of zip top bags) were packaged inside of another zip top bag which makes it convenient for storage and accessibility. The only draw back, but certainly not a deal breaker, is that the opening doesn't quite go all the way to the outer edge, but I think that makes the bag sturdier so there is a plus to that aspect. These bags are of much higher quality than the name brand ones and cost a lot less. They arrived in only 2 days. It's an A+ from me.