The reviews seem to be real to me but I mean, there's no way to know for 100%. Technically you guys could work for a rival company and be feeding me bullshit hahahaha. No way to know for sure.
This is the Card
Here is an example of a review
" This is the best version of the R4 that I have ever used. Setup is easy, much easier than the original R4. The interface is much better, and makes the new DSi much more user friendly than the DS Lite.
Cons: There are no cons that I can find with this item. Maybe one thing, if you did not purchase an SDHC card for your old R4 card, you will need to upgrade to this style of card.
If you are investing in a DSi, and you use ROM files, then this is one item that you must have."