Hiya - Welcome to Pherotalk. 
It is actually good to come here with a healthy degree of scepticism.
And when you tell us a little more about yourself, we can offer better advice and the GC will help you find out with less risk. See this thread:
https://pheromonetalk.com/t/how-do-i-qualify-for-a-25-gift-certificate/19934
And in the meantime, you could do a lot worse than read this thread for all the basic info on choosing and using pheros effectively. Again, this greatly increases your chances of a wholly positive experience:
Hope to hear more about you soon.