I use these bubble envelopes all the time to ship small cosmetic orders. I have been shipping for 30+ years and I find this to be a necessity for fast easy shipping at a minimal cost. I have had no problems with damaged products so that is a plus for sure. I like to keep them in stock for that client who just called and needs something quick.
I do a lot of mailing out of books and documents. Some of them are heavy and I cannot ship in a container that will result in folded pages. The quick strip works well most of the time but sometimes it is necessary to use tape to secure it. The bubble wrap is effective and light weight. The major drawback is that these are expensive and there are no volume discounts as is possible with some mail order firms. I also am a firm believer that "once is not enough" and I frequently am able to use such mailers more than once.
I mail a lot of DVDs that I make. These mailers are perfect for them. They protect the DVD boxes very well are the perfect size and weigh only 3/8 of an ounce each! I think that Staples should mention on the packaging that they are exactly right for DVDs.