I have purchased and will continue to purchase this product for all my mailing needs. The price is right and the Quality is there so why would I go anywhere else?
We used the product for a mass mailing for a political fundraiser. The envelopes were relatively easy to open after they were sealed which is good in case of mistakes but they did not show any proof of having been tampered with. A good thing I would have liked to see is if they showed some evidence of tampering after being opened.
The convenience is what it's all about. I despise having to seal with moisture the 600 - 800 letters I send monthly so the pull and seal is the way to go.