Hard to rate as the layout is different each time I come here. Facilities near United gates are okay, others not so much. Unitedlounges are crowded and terrible - better to sit in general population.
Terminal A does have a United Club and it has far fewer passengers than Terminal C. The bartender is apparently bored because not enough people are asking for alcohol.
Shuttle bus to the modern Terminal C runs every 5 minutes & keeps you in the secure area. There are stairs & an elevator that take you down to the bus.
When choosing your travel outfit, less is more. Avoid wearing clothing, jewelry or other accessories that contain metal when traveling to cut your time barefoot in the security line.
If you are a smoker be sure you have one before you go in. No smoking areas once you pass security. **if must,make sure you have some time to spare, you will have to go through security again
Be prepared to wait at baggage claim an inordinate amount of time. It is never timely. Have a book and a cup of coffee. No bathrooms on bagclaim levels.
AT&T service is bizarrely poor here. You'll get a decent signal but speeds sometimes 1% of what you'd expect. Slow, unreliable, paid wifi so download your entertainment before you leave.