The more you know about your products the better, hopefully you have even had a chance to try some for yourself :)
There are training resources in your Miaccount, log in and go to Resources, Business Info & Training. You will find a number of videos and pdf files that will give you lots of information.
You can also go to the You Tube link at the bottom of this page and you will find more videos about the Miessence products and some great interviews with Miessence representatives such as Arun Pradhan and Stephanie Brua.
The more you know about your products the better, hopefully you have even had a chance to try some for yourself :)