I saw the presentation but found it really confusing and had no idea what the different options did, so it would be interesting to hear peoples' opinions.
I bought one of the curl kits - can't remember the name - but it claims to increase your curls. The shampoo and conditioner (pure body) are ok, nothing special and did seem to have a faint cat pee smell. The curling spray did work and produced some nice curls but left my hair very dry and bity. I will not be buying the full sizes as they would be way too expensive (discovery kits were £25) and not worth the money. Hope this helps!