Pros
The starting position of salesman is a good job for anyone under 21 or so. Any older than that and you're gonna start looking elsewhere because there's really nowhere to get promoted to, unless you're a great salesman and know how to work the system.
Cons
Bad pay in entry level positions. If you're any good at sales, look elsewhere like a car dealership or something. The few options for promotion are a joke. Department Manager and Assistant Manager just mean you're going to get stuck with twice the work for pittance more. I'm one of the fortunate few who found a support position off the sales floor, and I wouldn't go back to the floor if they paid me double. Oh, the health plan is garbage. People say things like "If you're not motivated, you won't succeed here" I'll bite - you'd have to have the patience and discipline of a Shaolin monk to not get demotivated here, all the while making $10/hr, if you're lucky.