At the top of every page are a bunch of little blue buttons. The third one to the right is the Search button. You can use it to find all kinds of info! Type "Primo" in as the keyword and you'll get TONS of info. If you want women's experiences and opinions, try limiting the search to just the Women's Board. You'll get less hits, but possibly more relevant info.
Once you do a general search, post your specific questions. The more specific info you can give the more detailed answers people can offer. Info about youself is also helpful - training, diet, AS experience, goals, etc.
Primo is offered in both injectable and pill. There are many different brands, each with their own pluses and minuses. Side effects are the same as every other AS - and some people get sides, others don't!