Terrible service, rude, wanted me to wait ages for the notary, even though people were coming and going after me, left after 15 minutes. People were complaining about the service while I was waiting.
Google+ reviews for this store at 5405 ALTON PKWY STE 5A Irvine, CA 92604 are overwhelmingly negative.
Turned out that the document I wanted notarized could not be done, so I wasted a significant amount of time driving to another UPS store on Culver/Walnut who were very helpful. I finally managed to post a comment on the main UPS website after searching for the word "complaint."