Stuffed 800 envelopes. The pull tabs made it easy to seal the envelopes. The envelopes were also creased nicely so the top flap folded down quickly without any 'bubbles'.
I have to do a mailing once a month of over 50 newsletters for an organization. I find these envelopes easy and very convenient to use due to the fact there is no licking/wetting the flap to seal.
I ran this through a laser printer and they didn't shuffle or misprint and of course didn't seal themselves shut as they went through. I would recommend for any laser printer especially.