Its very low to ask for a testimonial from user which I never do. Also to publish someone's message which they sent me in private chat, I have no right to share it publicly.
Like a wise man said, you will receive lots of critisism if you do anything bad, but never should expect nice words when you do good things.
There isn't any critisism for any of my services yet and I make sure to deliver what I promise and If I cannot for any reason, I compensate that by giving full refund and additional free services on top of the ordered ones.