I've been using their products since 93 and really like most of them. As a family of 5 (now) it's easier to meet the monthly minimum purchase requirement than it was initially. If your into vitamins and nutritional supplements it's a no brainer, if your a minimalist and use vinegar to do 90% of your household cleaning then it wont work for you.
We like everything in the laundry line, Solumel is a staple here and well as the rest of the cleaners (clear power, tub & tile, soluguard). Diamond Brite for dishes is the only one that doesn't leave mine cloudy and spotted w/out using a heat cycle. I have sensitive skin and SWEAR by the Nicole Miller skin care (Timeless rocks). The kids all use Mela Oil shampoo and while it doesn't smell as fun as "kid" shampoo teatree oil wards off lice which constantly flies around school and mine have never been effected. I really like the naturals soap (has oatmeal so a bit of a texture to it), and the kids love the kids body wash. We also really like their bandaids (they are fabric like) and LOVE the sunscreen (both spray and the lotion - not the lip balms though).
I am not a person who is big into lotions or "smelly stuff" so we skip most of that line, and I like my salon hair care items better then the mela hair and styling products for me. Their candles are really nice though and I will on occasion pick one up, but maybe once a year.
The way I have found it works for me is we are on a 3 month cycle and add in or remove as needed. So one month we buy cleaners (bathroom and house), next month is beauty (skin care, soaps, shampoo) and then the 3rd month is laundry and dishes, then repeat 1-3. If I need sunscreen or other misc items I add them in, but staying in my product groups helps me plan for purchasing so I never have to think of what I am running out of or what to get to meet point requirement. Also if you shop before the 15th of the month you get reward dollars (% of your purchase given back in points) which I basically ignore year round. Then in Oct or Nov I redeem my years worth of points and pick up a few gifts with them. It's a nice little bonus.
All that out of the way, I did do the biz end for a year, decided it wasn't for me but have remained as a customer since. I still do get small checks each month which is a nice little bonus.
If you do sign up even if your mom isn't doing the biz end, make sure you get signed up under her. this way she'll gets a little check each month for referring you. It won't be much, but an extra few bucks is an extra few bucks!