Vantaggi
Fairly easy to get hired/rehired. They do not fire employees over small mistakes or to cut down on their budget. In fact, they were the last company to carry out the mass layoff when the oil industry was declining. Plenty of overtime. Lower levels of management and regular employees usually have good interactions with everyone getting along and caring for each other. Benefits used to be very good but their health insurance plans started becoming too expensive (thanks to Obamacare initiative).
Svantaggi
Stressful work environment. Lower pay rates compared to similar companies in the industry. The higher up levels of management only focus on numbers, not the overall wellbeing of their employees. When there is a high demand, employees may be "required" to work crazy long shifts all week for several weeks to months. It's just bad management in general. Also, they would lie to your face even when they know you already knew the truth.