What's worse, the Storm2's implementation requires a surprising amount of effort to actuate, meaning that long messages were a chore to type out -- not only do they wear out your fingers, but it gets old hearing the screen's loud "thunk" each and every time you type a letter, which we find considerably more noticeable than the traditional click of a physical QWERTY keyboard.
Most seriously, many Metro apps seem to allow you to click deeper into their various levels of content using thekeyboard, but then require you to use the mouse just to get back up to a higher level.
The Storm posed a special challenge for RIM because the company's operating system had always been tailored to a keyboard and click-wheel or track-ball for navigation, rather than a touch screen.