Our opinions are our own. It can deliver value to Delta devotees, but thanks to its increased annual fee, it's not the no-brainer it used to be.

Each year Forbes ranks the world based on a variety of categories ranging from the wealthiest people on the planet to the best colleges America has to offer.

Subscribe to Sky Sports to watch live, or stream on NOW. You'll need a subscription that includes Sky Sports Football. A look back at some classic Football League play-off finals from years gone by.

Subscribe to Sky Sports to watch live, or stream on NOW. You'll need a subscription that includes Sky Sports Racing.