I prefer the straight-sliding keyboards of N810 and N900 for several reasons. One reason: it provides exciting possibilities to replace separate keyboard and camera-grip OHs. Or, the holes of a Sliding Qwerty Half can be used as a lens hood and a lens cover for the camera of Jolla phone. Please see what I wrote to http://talk.maemo.org/showthread.php...27#post1379527

The exact places of the Ctrl and Shift keys seem to vary on N950, depending on localized languages and perhaps also HW versions. To me the keyboard of N950 does not look too bad in picture http://talk.maemo.org/attachment.php...1&d=1379155831
except that its tilting screen mechanism is worse than the straight and less complex construction of N810 and N900. I believe that the Ctrl key was moved to the right-thumb edge to make it easier to make the most common shortcuts of Ctrl+A, Z, X, C, V, B.

Regading your comment "space between buttons is too big", my comment is: what matters most is the shape of the keys, not their exact dimensions. The reason why I don't regard the keys of N950 as ideal is the flatness of the keys. Actually, it is the distance of the tops (centers) of the keys that matters, if their shape is spherical enough.