You wouldn't think there would be a significant difference between name-brand and Staples-brand envelopes. The whole purpose of getting these over standard envelopes is the peel & stick feature. Unfortunately all of us in my office that have used these have found them difficult to peel. I've used a name brand product in the past and this has never been an issue. The Staples brand however was problematic enough that it negated much of the "peel" benefit. They still work of course and are better than licking (or otherwise dampening) standard envelopes but just barely.