The input display is useless and too long
when you type a word must go slowly departing as the first letter is often a bit long to register
The big black multifunction button at the bottom right (prev, next st, acc / sym) is poorly designed and if we do not look good or is pressed it jumps to another thing not desirée, annoying
Sometimes, but rarely, a word or eronné not found on the machine, not to act on a toucche or stop, the only way to remove a battery and restart, painful, we must foresee a mini screwdriver handy !