They work fine! Just got mine today and tested them. Others have commented about problems with sticking and size. They're the exact same size as the 9's from a major office supply I've been using for years that just got too expensive at $65 per 500.I was also using a competitors peal-n-seal that went up in price from$43 to $58 per 500 just this year! Same complaints were made by people about that brand as well which I didn't observe or have a problem with, they just got too expensive also.Though I'd give a box of these a try to save $ and see how they hold up. It'll take a while to use them all as I go through about 50/month on average, a little over a box of 500 per year so I'll see how well the glue fairs. Other brand didn't dry out as some said and I doubt these will either. Sure you get a bad one, or even a bad box once in a while. It's happened to me with the major name brand as well! That's no reason to bad mouth the entire line or company. Just file your complaint with the seller and get a replacement, simple! If it continues repeatedly, then bad mouth 'em.Glue doesn't feel real tacky, and yet I was pleasantly surprised when I stuck the flap and then tried to open it. It wouldn't come open without tearing the envelope even though it appeared like it wasn't stuck very well. That and the security pattern works because you can't see what's inside, as it should be. If your that concerned about it, then don't use windowed envelopes! ...Duh.The windows are correct and match my invoices perfectly without needing change as I'd set them up for the other brands I've used in the past. Addresses are centered in the windows right where they should be just as with the other brands after folding horizontally in thirds and stuffing the envelopes! For half the cost of others they're a good replacement! Paper's a 'tad' lighter, but 'not by much' and is negligible IMHO. Standard 8 1/2 by 11 folded in 3rds fits perfectly with just the right amount of spacing. I'm pleased with 'em. ;-)
Rating: [5 of 5 Stars!]