didnt work with them before, if you have any questions,you can contact their customer service directly,i think,they will help you fix all confusion. Got my r4i gold from us store
http://www.modchipfactory.com/wood-r4i-gold-3ds-flash-cart-for-3ds-xl-3ds-dsi-and-ds-lite-p-1.html ,arrived my door within 5 days, free shipping ,cost me 18USD,the r4i gold i received with a top game compatibility,if you need,you can also give this store a shot.