Self-sealing envelopes are great but these may be a little thin given that one corner always gets crimped by my printer. It could be the device and not the envelopes but thicker items have no trouble in my printer.
I like the concept but the execution is poor. First it is very bumpy and difficult to write on the front before it is sealed. Second there is no way to close the envelope without sealing it. We often just fold envelopes closed so the recipient can retrieve the contents then use the envelope to return a portion. These envelopes make that task impossible. The peal and stick work much better for our purposes.
I got these envelopes instead of the old fashioned lick and seal and the type where you need to pull of a small paper strip to get to the adhesive. This type is much easier faster. I will order this kind again.