Pros
I first started working for Frito Lay back in 2004. The hiring process was quite extensive and for good reason. The hiring process weeded out candidates that weren't suited for the job and allowed for a more refined search for qualified, reliable hires. At the time everyone was hired to make roughly 50K (or better) per year which was not difficult if you applied yourself. Each new hire was given 1 week of classroom training followed by 5 weeks of one on one "in the field" training with a seasoned/experienced sales rep. My last three years of employment there I averaged $70K per year. Not bad for a job not requiring a college education. I really liked the job as your pay was based on how hard you worked (base rate + commission). Even with the long hours, it was/is the only job I've ever had where i wished I could at times, stop the clock. The days went by extremely fast even when working a 14hour day.
Cons
One of the biggest challenges was learning product codes (no longer relevant since the intro of new computers in 2008). For new hires currently seeking employment the biggest obstacle would be getting familiar with the hand held computer, learning schematics (where to place each brand of snack), and some very long hours (I would often start at 2am and not complete my day until 4 or 5pm). On average I would say that I worked 11-12 hour days, but almost always had the support of management to help complete my goals.