I use these regularly for quarterly mailings and some boxes have a problem with one bottom corner of envelope being stuck together so I have to open it before I can stuff it. Gets annoying when you have 500 envelopes to stuff. Box I just received is good so hopefully the QC people at the factory have got it solved. Will continue to buy these.
I have used these envelopes for years and never had a problem until this last box I received a week or so ago. Went to use them for the first time today and there is a huge difference on where the windows are located. Did not realize this until after I had printed off checks and the address is visible but NOT the company name. Now I will have to go realign ALL of my projects that use these envelopes. Not a happy camper. So now when I get my next box I will have to do a test run to make sure all the forms/checks fit the window. Why change something when it was not broken.
The envelope flaps do not stick well when moistened. When inserting preprinted Intuit checks or Quickbooks pre-set forms the windows are a bit tight on one end. For the price point though I will still continue to buy these.