I don't know.... their site looks like a ripoff of the R4i-SDHC.com. It might be a rebrand of the same card, or it might be a bad quality card. No idea.
I heard this one is good.
http://www.r4ids.cn/
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Also, DO NOT buy from here.
http://www.r4isdhc.com/
Those cards have a timebomb to make the card useless (unless you change the year). Afaik, the 2016 card lasts till 2018.
EDIT: One more thing. Get the R4i-SDHC 3DS RTS. Even if they stopped supporting it, you won't need any other cart. Nintendo pretty much gave up blocking NDS flashcarts.
Yesterday I had bought a R4I Gold 3DS and it should be here between Monday-Wednesday. I'll report back my opinion on the device, but from what I've seen of the device, it looks genuine.