Vantaggi
Most the people are very interested in your success and are willing to put in extra effort to help you because as an MLM company your success is their success. If you want to get into sales, practice effective body language, persuasion skills, work on building confidence, presentation skills I think you can benefit for a short time practicing those things on your own as they probably wont be taught except only to improve your specific product demo. If you're a great sales person you can make good money.
Svantaggi
Speaking as a former Rainbow dealer of 2 years. The commission is bad per the amount of time spent demo-ing. They will prey on your friends and family for Rainbow sales accepting that attrition is high they'll get your immediate network to buy first and if you don't make it outside say the 3rd degree of separation at least they got a few sales out of you. That's why some groups are always talent scouting. The experience is not worth much on a resume so if you do this for a long time and you finally want a corporate job I dont think they're much value in door-knocking unless you're talking to Mark Cuban, pitching a product that's good on Shark Tank. The company brainwashed you into believing the Rainbow business model and culture is the best thing and you can get roped into it longer than you ought unless you're really moving up quickly. Lots of false promises just to keep you in, but frankly if you're not on top, your distributors are probably not very smart, just clever and good at sales. They probably can't teach you much of value for use in corporate if you eventually want to get a job with benefits. Customer service is like a foreign language to them that they don't care to learn.