It's all about finding the sweet spot. A website should be music for the eyes.
"I absolutely love the site! You are a genius! You are an Artist!"
"You understood my vision of how a cool, modern and forward-looking mobile website should look like! I think this site matches the great flow of sites like Apple and Google Play, just to mention a few, you are definitely inspired my friend!"
"You helped in ways I did not even know what I needed."