i need a external keyboard that I could use while travel . the big keyboard do not fit in my computer case , and I could not find a bag large enough to carry everything comfortably . this 15 '' keyboard be able to fold in half or even roll up . the only difficulty with the product be that it truly have quiet key ... which can be hard to get use to . also , the key placement be a bit tricky , and for advanced window user who use the keyboard shortcut , sometimes it be better to reach over and use the laptop keyboard .