Yeah, I suggest Lightake. They're a really good site, and they're only charging 10 cents more than that site you linked to.
people complaining that they never got there flashcard from Lightake
That was during Christmas time and the problem wasn't just lightake.com. I've ordered a few times from Lightake.com during the last 6 months and the products have been in my hand in around 2-3 weeks (incl. Christmas time) of which the delay was because of Hong Kong post not sending the stuff to my country. I'd imagine they wait for a certain amount of packages before they put them on the plane.
@OP:
All in all considering different shops, my recommendation is the following: If you want a certain product, go for a shop that has been around for a while. A shop selling only flashcarts isn't necessarily a bad thing, but usually they can't manage with only flashcarts. Also as mentioned before, a site which is named after a clone card, isn't necessarily the best considering support/refunds if you have problems with your product.
Considering shipping times, think about the following: There isn't a thing called "Free shipping". Shipping costs at least a few cents and this is a fact, otherwise it'd be a free service for everyone. If you pay about $3 for a product, you can be sure that the shipping method used will not be a courier from UPS/FEDEX who'll call you when the package has arrived. Keep this in mind when considering shipping times, especially when ordering from China/Asia in general, if you live in the States or the EU.
-Qtis
A big thanks to all your advise guys. I have decided to go with R4 3D Upgrade Revolution from lightake. I have 1 last question. The R4 lightake sells are they authentic or just clones??