Pros
The tractors are in good condition. If you don't want to think for yourself, and you want to spend more time jumping through hoops than getting things done, this is the job for you.
Cons
They have no loyalty to their employees. They fire employees at the first sign of trouble to limit liability (I'm not speaking of myself). They do not pay overtime in Oregon because they don't have to. Where they don't have to pay overtime, drivers work long days. Where they do have to pay overtime, employees work 8 hours. They care about production numbers more than safety and reasonable working conditions. If you are willing to run way too fast and skip lunch, they like you. That is until you have an accident because you were running too fast. Then you are generally fired.