Stay away from this site!
Here's my story. They advertised they had solutions to all homework/quizes/tests for the course i was taking, all for $100. I sent them money via paypal and they sent me some solutions, which did not match to my course. I sent them email explaining this and few weeks later they sent me another set of solutions which did not match again. When i asked for my money back i got no reply, they have been ignoring all my emails to them since. The phone number listed on their website does not work. Stay away from them, there are many more other websites much better then this one.