They sell mainly Western Reserve Life's policies backed up by Aegon Bank, a dutch bank. They surely help people who don't have concrete future financial planning. There is nothing really wrong with it.
The issue is the way World Financial Group recruit. You have to know the followings:
1. You pay $100 registration fee
2. You pay 52 hr. life agent course study -- various schools are available online, you attend in person etc. etc.
3. Test fee
4. WFG's each office "seminar" does not offer product training.
5. Your commission is only 25 - 35% unless you have 3 agents beneath yourself
6. Multi Level Marketing. In other words, pyramid scheme
7. To learn various kinds of financial products, you pay the tuition from your own pocket
8. Your mentor sells not only life insurance but also mutual fund