I have used the stuff in the past, the most reliable company is by far androtics -
http://www.androticsdirect.com/home.php
They have an amazing support forum for questions and random shit @ pherotalk.com -
http://www.pheromonetalk.com/
I would say do some serious reading up on it before you test the waters.
Personally I recommend A314 if you do decide or 'turn up the heat'.
MY personal experience of it was a major major skeptic, but like most things I will try them to firstly get personal not hearsay experience of it and secondly to see how it works and what it does. After trying it I can say im pretty sure it does something, initially I said hmm maybe it's just a inner confidence booster and nothing else but over the time of using it ive noticed a few different reactions or things that cannot be explained by inner game or anything else than 'it'.
An example of this is a non visual 'hit' were I moved past this attractive girl on the dancefloor in a club facing away from me, but obviously in very close proximity - she got this 'cattle prod effect' as I like to call it when it happens, almost like I pinched her bum or something and she turned around to look at me and then actively engaged me.
This and plenty of other incidents, personally leads me to believe there is deffo something going on here with this stuff, I cant just wave it off as snake oil.
You need to decide yourself if it's worthwhile or not, thats your choice, just read up on it before you commit, and dont go in thinking it's a magic pill.... you put lipstick on a turd and it's still a turd gents!