In the DeathStalker Ultimate, Razer took their popular keyboard design and combined it with a touch-screen LCD panel for use with their customizable Switchblade software. Despite the added bells and whistles, Expert Reviews found it to be "an incredibly slim keyboard," while PC Mag had an issue with the keyboard's backlight keys, as they pointed out that "when the backlight is turned off, the transparent lettering blends into the black of the keys enough to make it hard to read." They also thought the keyboard's scissor switches felt "a bit mushy, with very shallow key travel." Gadget Review disagrees with the latter, saying "there is no lag and everything seems very responsive," as do Destructoid, who found the keys "impressively responsive." The DeathStalker Ultimate offers a lot of customization options, most notably with the built-in LCD touch panel, and PC World says the Switchblade UI is "a really neat gimmick that works surprisingly well" and "the gesture controls are a nice touch." In the end though, PC World feels the UI is "more like a gimmick than a useful feature," so unless you need to have Switchblade, you can find cheaper gaming keyboard options.