This reminds me of umpteen years ago when I was a young supervisor in a call center (non-travel). One of my best agents stopped me as I stood up to go to lunch and asked me to take a call from his customer as it was a compliment. As that was one of my favorite things, I did.

The customer started off saying the guy he just talked to was good, but...

He chewed my ear for a good half-hour! Not about that agent, but other problems...

The very best customer service companies in the world have as a goal 1/4 compliments to complaints. Very few reach that. And the ones that do are generally in relatively simple businesses. I've never dealt with one yet that didn't value compliments very highly.