Hi Yanni & nice to have you a member of Pherotalk 
Sorry to hear about what happened to your pherlure, i myself am scamed by it too. Glad you decide to join in this forum & your keen interest on pheros here As both my buddies Jamesbonded & Mockingbird have said the pheros here are great & really work
Ok well for your questions there, there is not much cons but a lot of pros in the pheros here. A few examples are Instant Shine & Instant Openness. Instant Shine make the user feel comfortable & happy & Instant Openness can make the user become a chatterbox & it also reflect to those who come in contact with them including females. Here is a link to a lot more detailed info about the Instants here> mens pheromone guide
I hope i managed to help you there. See you