I just looked over the gamblerswarehouse.com website, and sure enough, after reading the "About Us" page (which was oddly devoid of graphics) I clicked to see their products and was steered to playingcards.net.
The company appears to be exceptionally clueless in selling online. I click on images to see a zoomed image - and it turns out to be just a few millimeters larger, with this weird-ass "boing" visual effect where the images bounce out of and back into the page as if mounted on springs. Many products have the incorrect photo to go with them, they describe the orange-back, white-border version of the Yomiuri Giants decks as "New York Giants" (and are selling it dirt cheap, by the way), clicking through to product descriptions is a fruitless exercise in patience - all the descriptions are single-sentence descriptions of the product titles, nothing additional about the product. The product arrangement is pretty random, with the listed categories appearing to be merely suggestions as to what you'll find there.
To sum up - it's bad.
I give them kudos for carrying some Kickstarter decks, even the limited edition ones only meant for sale on Kickstarter, though the pricing of the rarer ones can be a little harder to swallow.