In case the keyboard is hampered by the phone's compact size, the screen is even more on the compromise. Sony Ericsson Xperia pro has thankfully increased the screen size slightly with the X10, as this model has your 3-inch display, which is up with the 2. 55-inch screen used on a X10 Mini Pro. The resolution has stayed precisely the same, but at least at 320x480 pixels it's relatively high for any screen size. The display is your capacitive screen, so it supports multi-touch gestures just like pinch to zoom in the technique -- handy, as you really will surely have to use the zooming feature a bunch.
The tiny screen does compromise a browsing experience, as when you use the browser in portrait mode you need to do an enormous amount of zooming in just youngster should be read text on a website. Elements are slightly better in landscape style, but not by all that a great deal. You still can't really read content of text on pages without using more then one level of zoom, unlike most large smart phones.
Also the onscreen portrait keyboard is focused by default to a keypad-type system with multiple letters per key, that is certainly annoying. You can change it to the standard Qwerty layout, but then it's quite fiddly to implement.
The small screen also means training videos and pictures lack the impact they may have on devices with larger displays. We wouldn't particularly wish to watch a full movie on the Mini Pro for a flight or train journey, for model, but we'd happily watch one on a larger screened device for example HTC Sensation.
In other ways, while, the screen is actually quite fine. Contrast performance is impressive, so it's used to teasing subtle detail out of darker instances of pictures or videos, and colours will be rich and strong. Brightness levels will be good too, and it's certainly pretty useable outdoors under stronger sunlight.