Mustache

I'm awkward around a good mustache.  I just... Well, usually they're pretty awful; so a good one takes me completely off guard. My first instinct is to compliment the person, but how do you phrase that?

 "Hello, I just wanted to commend your choice of facial hair- it's attractive rather than gross"  

"Excuse me, I couldn't help but notice that your mustache doesn't look terrible, what's your secret?"