Although I don't usually pay the bills for our family, I know Paul is using online bill pay. I know this because other the past year he has asked me for stamps less and less. Also, I've noticed that the checks I write (for things I can't do online for) are sometimes the only ones in the book for weeks. Sometimes I know because I'll hear his frustration when a website is down and he has to either wait or pay with an actual check.
By using
online bill pay we've also seen less mail because statements and bills are coming through email. Of course the kids aren't too happy about this since they like to help me carry in the mail!