With a shiny black lid and real leather wrist rest, the £1,399 Asus U1F puts the "ultra" in ultraportable. The lightest Windows Vista laptop we've reviewed, the Asus U1F was a dream to review on the move as it weighs just over 1kg.

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The thin case offers a surprisingly full set of connections, including built-in Wi-Fi and Bluetooth wireless communications. You could use the bright screen to find your way out of a cave, and the battery lasts for more than six hours on one charge. These are good qualities for an all-day, on-the-go laptop to possess. But can you type on it?

All the keys look big enough and are in the right places - but alas, the right Shift key sits on the right side instead of left side of the up arrow key, dooming touch typists to jump up a line in the document every time they try to use their right hand to capitalise a letter.

Astonishingly bright and easy to view indoors or out, the U1F's LED-backlit screen measures 11.1in, making it a little easier to read than the 10.6in LED-backlit display of the Fujitsu LifeBook P7230. The U1F also has the edge over the P7230 in performance and battery life. Although equipped with a slower processor (a 1.06GHz Core Duo U2400), the U1F parlayed its 1536MB of memory into a WorldBench 6 Beta 2 real-world speed score of 39, about 17 percent higher than the P7230's score of 32.