The N97 is the first N-series phone with a physical QWERTY keyboard, which many users prefer to touchscreen keyboards.
The keyboard itself is a little wide and the space key is rather small and awkwardly placed. However the keys have a nice texture and after a while typing is quite comfortable.
The addition of a QWERTY keyboard to the N-Series is a good example of the blurring between high-end consumer and business phones.
Another feature attractive to business users is the inclusion of the QuickOffice suite with the mobile versions of Word, Excel and Powerpoint.