I spent over $2,000 to fly United Polaris, a 'reimagined' business class. It's only worth it for trips over 10 hours.

• United Polaris had everything I needed to feel comfortable on a long-haul flight.
• The service was great and the lie-flat seats were comfortable.
• Although I enjoyed my experience, I would not upgrade for a flight less than 10 hours again.

I've flown business and first class on several airlines, but I didn't know what to expect on United Polaris from Newark, New Jersey, to Rome.