Friendly and helpful, from the nice lady at the ticket counter who helped check in my declared firearm in my suitcase to the gate agent who managed an organized boarding process, the folks I dealt with directly with Delta did a great job.
Delta has several afternoon options to get back east, like many carriers. Through Atlanta, Salt Lake City or Minneapolis, and they also have flights to Los Angeles and New York/JFK.
Delta still flies a lot of Airbus which have no power and no seat back IFE, so a four hour flight gets to be a lot of boredom.