Pros
You get some degree of freedom. It's fun to have a small amount of control over your pay check.
Cons
The year I spent with Ecolab I was tied to my phone 24-7. No training. I lost a lot of respect from my customers because I was never given the resources and training to do my job. I learned more in one month working for EL's competitor then I did in one year with EL and all their training programs. EL breeds a culture of unmet promises. Every area manager, district manager, and territory manager I met had no problem telling anyone anything they wanted to hear and then conviently forgetting the promises that were made. Never expect your manager to do what he tells you he will do. Never expect pay outs on contests and sales objectives, and don't expect any compensation for gas and other expenses no matter how many times your boss promises to pay you for them. Do however, expect them to sue you if you go to the competition and take a sh-t load of business from them.