Cons:
There are too many to describe. Overall you could damage your health and you could end up looking deformed if you use the wrong type.
Pros:
Strong, buff body
Cons:
Unnatural buffness
Risk of dying
Small penis
Makes you moody and aggressive behavior
the pros are you get more muscle faster for less work
the cons you might beat your gf to death in a fit of roid rage.
This sight should help you out:
http://grammar.ccc.commnet.edu/grammar/
