Keyboard layout :(
The reaction has been thus:
If you are very use to T9, it is no faster than T9.
If you are phone noob, it is much easier and people type faster on the FASTAP keypad.
One advantage the phone has over a QWERTY keypad is that the phone maintain a REASONABLE size unlike QWERTY which are not suitable for clamshells and make for either large or fat bar phones.