Summary: These being said, the Asus Zenbook UX21E is among the thinnest and lightest ultrabooks around. It delivers a good performance and, if you’re willing to overlook the somewhat poor keyboard and webcam, you’re in for a pleasant experience.
Conclusion: Given the lack of any Intel-specific Ultrabook software I'm hesitant to even call this thing an Ultrabook. There's also the fact that, at least in the case of Intel Rapid Start Technology, being more of an Ultrabook in that sense would've been a step back in performance.
Conclusion: If it's time to trade in an old clunker, we're confident that you'll find the ZenBook UX21E a worthy replacement. It's fast, attractive, and light, and it has most of the latest and greatest technology in a laptop of its type.
Pros: Highly portable, Strong and fast performance, Gorgeous polished-aluminum case, Superb audio system
Cons: No memory-card slots, Keyboard a little shallow, and lacks backlighting, Slightly less-than-vivid color reproduction
Summary: Perfection. The power version of the Zenbook, with a Core i7, is as handy as a netbook but faster than most multimedia machines. How is this possible with a build height of 17 millimeters? The lightning-fast ADATA SSD sets the standard higher than ever.
Pros: Low weight and slim case, Stiff & high quality aluminum case, Good input devices, Very good application performance, Extremely fast SSD, Very bright screen, Unequivocally solid aluminum body. We gladly accept the few grams more compared to the MacBook Air.
Cons: Few interfaces, Reflective screen, Poor colors, viewing angles, RAM & battery built-in permanently, Short battery life of less than four hours, Very loud during load, A battery life of at least five hours and wide viewing angles.
Conclusion: The UX21E Zenbook offers great performance and is priced at £850, with accessories included. However, it is still difficult to recommend the device to traveling users based on the limited battery life and poor trackpad.
Pros: Great design, bright screen, fast resume times, Intel Core i5 chip.
Excerpt: It was all looking so good. The feel of cold, smooth, brushed aluminum. The solidity of a thin form factor. Beautifully sleek design. Keys painted to match the brushed aluminum chassis. A large clickable trackpad. Good build tolerances all around. Sub-2.5lb weight.
Excerpt: Ultrabooks are the Windows alternative to a MacBook Air, but until now we’ve only seen examples with 13in screens, leaving the 11in Air unchallenged. Fortunately Asus breaks this trend with its UX21; an 11in version of the Asus ZenBook UX31 .