Recently gateway team released the firmware 2.1, that's the hot topic. Awesome, it bring us so many functions such as muti-rom and rom backup avaliable as the MT card can do. AND as far i know, gateway , r4i gold D.E and mt card, can all support 3ds games. Just want to know the difference and make my choice. Here just find some compare. http://3ds-card.blogspot.com/2014/03/which-is-best-card-for-3ds-games.html
compared to other 3ds flashcart,the striking features of gateway 3ds lies in it support all latest 3ds games,inclued pokemon x /y , but it was also the most expensive card. If price is you cared, you can buy mt-card, this card can support multi 3ds roms to allow us play lots of 3ds games at one micro sd card, and the price is cheaper than gateway. If you need , here is a usa based official agent store for you : http://www.modchipfactory.com/buy-mtcard-playing-3ds-gamemulti-3ds-rom-support-p-22.html
of courese the gateway 3ds flahcart now. If you want to enjoy these functions , just buy a gateway 3ds for yourself from here : http://www.usar4.com/gateway-3ds-gateway-3ds-flashcart-play-3ds-games-on-3ds-xl-3ds-p-8.html it supports 1 E-shop games 2 Gateway Card Update Improvement 3 100% Game Compatibility 4 Multigame Support 5 Game Card Dumper 6 Gateway FPGA Update == More to come! ==