I was a Continental then United Eltie Frequent Flyer for years. 1999-2017. Then I started a new job that required connections and tried Delta once and never looked back. They are fantastic in so many ways. Not everything is perfect, but they are by far the best Domestic airline. Our daughter is in college (a second year) and I have been able to gift her Silver to get back and forth. They have been great to her also. Some surprise upgrades here and there but even when not upgraded she loves their service. Thanks, Delta!