Basic summary (TL; DR): They are legit, but it takes forever to get your purchase. I would not recommend you buying from them, but if you are like me and already have, you will have to wait a few weeks, even months, to get your package. Or you can just get your money back through your bank. Just know that they are not scammers.
So, I ordered my bundle of r4 cards (3 total) sometime in late September 2015. I got all 3 r4s for just less than $30. It was a steal, so I got it. I happily placed my order and waited patiently for it for a few weeks. After a few weeks, I was wondering where my r4s were, and I decided to leave them a message asking when they'd arrive, and if there was a delay, to at least let me know. However, no response. After looking online, Many people stated that they were a scam, but there were some who actually got their orders, though it was received very late. I had come to terms with my stupid purchase, though it was my fault for not researching earlier, so I let it go this once.
After a few months, it had completely slipped my mind that I even ordered them, but one day, after sorting through my emails, I noticed that I actually got an email from them stating that my purchase was now being shipped and on the way. I was surprised to see that they even got back to me, but I figure it wouldn't arrive anyway, so I just got rid of the message.
However, today, 2/9/2016, I received my package in the mail. And personally, I am relieved that they are not scammers. It just takes a long time to get the package through customs and such. They are legit, but it is a GRUELINGLY slow process that I wouldn't recommend going through.
UPDATE (2/14/2016): The product is legitimate, as well. I ordered in 2015, but received the legit 2016 version. So if you were worried about quality of product, it is the real deal.