I think I prefer psion style because the keyboard protect the display and because I don't need keyboard for sporadical use so I prefer a keyboard more big.
For opening mechanism, perhaps that of the slide is more complex but in the end I think depends only on the quality of construction (and there is no problem with front closure).
For opening mechanism, perhaps that of the slide is more complex but in the end I think depends only on the quality of construction (and there is no problem with front closure).