The envelopes are perfectly fine for hand stuffing. We use a stuffing machine and they are slightly warped causing jams. Unfortunately we will not be able to use them.
I would of rather had the other envelope where you just had to pull the paper off to secure the envelope but staples were out of them in-store. Wish you had more options in the store instead of having to order them online and wait for them to get here needed the envelope that day couldn't wait.