Advice for beginners? Read.
Many people will tell you that GAW is legitimate. And as many people will tell you that they are a long-con Ponzi scheme. It's up to you to process the information that you obtain through reading and judge your level of risk.
But if you're just too lazy to read, then I have an easy answer for you. No, they are not legitimate. But that's just my opinion which you can read for yourself directly above your post.
Now I'm sure someone will come in and post something that completely contradicts what I've said. So who will you believe without learning for yourself?
Further advice... do not go to the GAW-owned HashTalk forum and ask your questions. Negative opinions are forbidden so you will not get honest advice. And in my view, that's further indication that they are not legitimate. Controlling the message through censorship and propaganda is always a bad sign.