Here's two real e-mails we got after our jobs:

Subject: RE: Confirmation for Sound System
From: Mxxxx Hxx
Date: Sat, 23 Jan 2010 17:01:29 -0500

Don,

The event went very well this morning!  Lara was absolutely wonderful.  Thank you very much for your kind attention and reasonable rates.
...

Subject:     many thanks!!!
Date:     Tue, 19 Apr 2005 08:18:30 -0400
From:     Xxxxx Xxxxxxx
To:     'Don Wade'

Thank you for making everyone sound so glorious. It was a wonderful evening in no small part thanks to you.

When Did You Last See a Rave Review for a SOUND SYSTEM?