They are good for temp storage but not long term. I have had all brands and they do leak, some last longer then others.

I had same experience as most others. Bags leaked.

I used a vacuum bag to send a 90x90" quilt to my sister. It allowed the quilt to fit in a box half as big, thus reducing the postage substantially. It worked great, but I don't think I would use it for long-term storage.

I agree with the others. My experience is that the bags stay compressed for maybe 6 months or so. Would work fine for shipping, but I would not store a quilt for longer than a week or so because of the risk of permanent creases. You can decrease your risk of permanent creases by folding the quilt on the bias (see how-to video here).

I only use them for short term items...such as mailing a quilt.

I've used them as well and some work better than others. But they are nice to keep large things in such as quilts and blankets. I've also used them for winter clothes. Even if they don't stay quite sealed they still keep cat hair out.

I found a bag that I stored my husbands shorts in, found it a year later and it was still sealed. Didn't think about mailing quilts and items like that. Getting ready to mail 20 12 1/2 x 12 1/2 quilt blocks wonder if it will work for that.

I got twin sized quilts into a medium box to mail to my GD's. Put the bag inside the box and then fold the quilt to go in.

They are difficult to get the ‘zip’ seal completely closed. Take your time and manually close them. The little plastic piece they have to zip them closed doesn’t work. The ends are especially difficult to seal. Once you get that done, they really work well

You do realize if you use the vacuum bag on your quilt that when you do remove the quilt from the bag it will be covered with wrinkles. So if your mailing your quilt in one of these bags and want the quilt to look nice for the receiver don't use one of these bags! The quilt will compact to 1/2 its size in these bags. But like the rest of the ladies said the air doesn't stay out of them.