I concur with Mrs. M.
I learned about AS when an item of mine was purchased several months ago and I got the auto email. It certainly didn't cause me to handle the deal any faster. I much prefer personal contact and this particular buyer obviously didn't. All contact from him was via "automatic" sources (Paypal etc) and I never received a single personal word.
In fact, I would probably deliberately delay getting back to someone like that just to show my disapproval. There is no substitute for courtesy and politeness, even in today's computer-mad world.
That's my preach for today.
GG