The keyboard is very awkward for me. To compress the space occupied by the keys, numbers are combined with the top row of letters - to type a 3 for example, you have to click Alt-E. All independent symbol keys are gone - you have to use the SYM key for anything that's not a letter or number.
For those folks used to texting on a cell phone keypad, the keyboard will probably seem way too wide - esp. for 2-thumb typing - which is virtually impossible if you have the DX in the Amazon cover.
For older folk, the wider spacing of the keys will probably be easier to use than the smaller K2 keyboard.