I paid $1,500 to upgrade my Delta flight from NYC to Paris. Here's what I got, and whether I'd do it again.

Kimberly Wilson paid $1,500 to upgrade her Delta flight. She details whether the hefty price was worth it. Kimberly Wilson Kimberly Wilson paid $1,500 to upgrade to Delta One, the highest-tier cabin for international flights. The Delta One Lounge at JFK Airport was a highlight thanks to its dining and spa treatments, she said. Wilson also detailed her luxury experience and shared whether it was worth the price tag. If there's one thing to know about me, I'm always going to splurge on…