If you live in an area full of consultants for your particular company, you may have trouble finding people who are interested. Also, if there are too many people in your area involved in direct sales in general, people may be tired of being approached about so many different parties to host.
You'll also experience competition with in-store products with a lower price tag. This doesn't mean you shouldn't sell the products, it just means you'll have to work harder to find ways to convince people to buy them. For example, consider product warranties that may not be available with the in-store products to give yours the edge and remind people they get what they pay for.