If you are looking for a mailer that will work well under normal conditions this one should work fine for you. Personally I would use it for a very full package too but then I would probably use packing tape to strengthen some of the weaker points.I find that Staples Brand products rate pretty well against brand name products in most categories. The one main exception that I have found is with binders. I have found that Staples binders fall apart within 6-12 months with the stress that my kids put them through.
It's hard to find this kind of mailer in various sizes and I appreciate Staples having such a large selection. The quality was extremely important because I had to mail some very special delicate albums to dear friends. Also because I bought these in a Staples some distance from my home it was important that I could have returned them at the nearest Staples if necessary. As it turned out they were perfect! My only wish is that Staples had more stores around the city. Thanks for asking for this feedback.