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Using Office 2013 on a touch machine is, at least in the public preview version now available, a tremendously frustrating experience. Even with the auto-hide ribbon, the Office applications are simply too complex to cope well with half their screen being covered up by an on-screen keyboard, and their interfaces are far too big for a simple band-aid such as "make the ribbon spacing a little larger" to be anywhere near adequate.
Things are a little better for stylus usersthough we note that the ARM-powered Surface tablet doesn't support stylus inputbecause a stylus is almost precise enough to manipulate the checkboxes, radio buttons and so onbut the on-screen keyboard problems remain.
Clearly, this is not exposing the full power and complexity of Office 2013 to finger users; too much is still designed around pixel-perfect pointing devices. The Office team appears to be positioning touch support more as a way of enabling simple edits to be made as a kind of fall-backa stopgap solution for those times when the mouse and keyboard aren't available.
The need for simplicity
As a set of reader applications, the suite works tolerably well. Opening and scrolling through documents works, and because these are the full Office programs, files are displayed with full fidelity and functionality. However, in this context, I find it hard to understand why Microsoft made the effort it has; Even Office 2010 works adequately well for just reading documents on a touch PC.
Unfortunately, as soon as one ventures beyond mere reading, the experience becomes unsatisfactory. Finger users attempting to make edits will find themselves regularly dumped into interfaces simply not designed for imprecise input, and even if they stick to the "main" user interface (the ribbon and pop-up toolbars), that interface works poorly. The interactions with the on-screen keyboard are frustrating and the interface is cluttered, leaving too little of the working area actually visible.
Having the real Office applications and their perfect support for Office documents is valuablebut this needs to be married to simpler interfaces that are engineered around reading and light editing, and that remove entire features and user interfaces that are too complex for finger usage.
As things stand, far from being a valuable feature of Windows RT, the Office 2013 applications threaten to make it worse.