[ZiiS]

Actually this one is really cleaver. The keys you see are actually a full QWERTY in the normal layout so no memorizing chords for typing English. [Shift] is just long-pressing Z so you are not completely confounding your muscle memory. Numbers and arrows being behind a fn key seems a good trade off for the space saved. So really only `[];',/` are become chords to match `{}:@<>?` on a full keyboard.

[Suppafly]

space being saved for what though? space saved is a false economy.

[ZiiS]

Most people use a 0% keyboard on thier tablet; I think space is the most premium. Personally I would not go this far in a desktop keyboard. Though I trade away the numpad to save space for a more central mouse.