Taking Novadex XT & Stimulex ES

Can anyone please help me, I have been advised to take Novadex XT to increase my lean muscle mass, and to take Stimulex ES to burn body. As I am new to taking supplements could anyone please advise me if the two products I mentioned work?

If so how long is it until you see a noticible difference on my body?
Your Help would be REALLY APPRICIATED!!!