They sell a wide range of products some of them I will list below

Washing Powder 750 Grams and 3kg Its concentrated as all there products are so you only need to use 15-30 Mls They have a Baby one also
Dish Drops
Loc Shower Bathroom Cleaner
Steel Wool Scrubbers
Air Filters
Water Filters
Make Up - Artistry
XS Energy drinks - Abit like a red bull different flavours like Citrus Tropical and a few others
Vitamins
Energy Bars/Muslie Bars With Yogurt
Pancake Premix you don't need any thing just water good for camping etc.
Bulk Food like Baked Beans Pasta Sauce etc.
Pet Food
Skincare

If for e.g. you buy a 3 kg washing powder and wash once or twice a week and its only one of you it will last about 2.5 years but if there is more using it and more often then obviously less I use to get my old neighbour the 750gram for her and her husband that lasted them about 6 months but it works out way cheaper to get the 3kg one even if you share it with a few people you could also share the other ingredients with a few people

You can sign up and try and get others to sign up also and sell the products and you get a % of there sales if you have signed them up or you can just order on line and have it delivered or find a Amway rep in your area that can show you the latest products

Its good for the convenience if you have a few kids and have to work to know it will be at your door

Not everything is that cheap but by the time you have to drive to the shops and back I thick some people just enjoy the convenience of it all
If you are not happy with something you can return it

The store may not have everything but online should have it