Pros:
1. You get it for free.
2.Works fine.
3.If you download from a membership site where they provide regular updates and malware free then you will never buy any script officially.
4.Cheap/Free
Cons:
1.May contain malware.
2.Hidden codes which may give backlinks to unreliable websites.
3.No direct updates.
4.Developers aren't paid for it.
5. Guilt, maybe
