1) keyboard-wobble/lack of stabilization. I have found the keys to be quite wobbly is this also the case for other people as well? (not that this is big problem it just make harder to get use to the keyboard)
2) hinge not closing completely if the amount of force applied is low. In some cases where I close the lid gently I have to manually press on the lid to completely close it.
1) If you are used to a scissor-type mechanism (common in flat keyboards, such as in laptops), which basically supports all four corners of each key, such that they will depress evenly no matter where there are pushed, the "center post" (I don't the formal term) type used in the Psion, Gemini, Cosmo (and
many other devices) may feel more wobbly by comparison.
2) That is expected and normal. To make the closed device a tad thinner, the screen glass pushes down all the keys when the lid closes. If the lid is closed carefully (which I recommend) you may reach a state where the lid rests on the keys. When you push it a tad harder, a set of opposing magnets will come close enough to pull and keep the lid shut. Personally, I find that last, discreet, yet firm, little "snap" quite satisfactory.