Sony Vaio VPC-X11Z1E/X
Specifications

Price comparison
Average of 3 scores (from 3 reviews)
Reviews for the Sony Vaio VPC-X11Z1E/X
Source: Tech Advisor

Perfect for internet use on the go, thanks to its 3G modem and reasonable more than five hours of battery life (336 minutes, 60 on performance settings), the Sony Vaio X VPCX11Z1E/X isn’t really fast enough for getting serious work done, but it’s superbly engineered and very usable if you can afford it.
Single Review, online available, Short, Date: 05/25/2010
Rating: Total score: 70%
Source: Techradar

An Atom-based ultraportable laptop that sets a new standard in mobility. Sony's VAIO range has long been associated with ultraportable laptops, and the 11.1-inch VAIO X-Series VPC-X11Z1E/X is one of the most extreme to date. The VAIO X-Series VPCX11Z1E/X may share its processor with cheaper netbooks, but there's a lot to separate this tiny machine. If you place portability and design above all else and money isn't an issue, then it's definitely worth a look.
Single Review, online available, Medium, Date: 11/14/2009
Rating: Total score: 80%
Source: Pocket Lint

There’s no doubt about the amazing portability on offer from the Sony VAIO VPC11Z1E/X, but whether it’s worth the money will depend entirely how much you value that portability. Think of it as a Sony VAIO TT replacement – a high-end ultraportable for executives – and it’s an excellent little device. It’s difficult to escape the fact that it does the same job as many netbooks however, and although none can match it for wow-factor or quality, several can better it for battery life or performance.
Single Review, online available, Medium, Date: 10/28/2009
Rating: Total score: 80%
Comment
Intel Graphics Media Accelerator (GMA) 500: Integrated (onboard) graphics chip on the UL11L, US15L, and US15W chipsets with a licensed PowerVR SGX core. DirectX 10.1 support but because of low clock rates (100-200 MHz UL11L - US15) and only 4 shaders not suited for 3D games. The integrated video decoder accelerates the playback of HD videos (MPEG2, VC-1, AVC).
These graphics cards are not suited for Windows 3D games. Office and Internet surfing however is possible.
» Further information can be found in our Comparison of Mobile Graphics Cards and the corresponding Benchmark List.
Intel Atom: The Intel Atom series is a 64-Bit (not every model supports 64bit) microprocessor for cheap and small notebooks (so called netbooks), MIDs, or UMPCs. The speciality of the new architecture is the "in order" execution (instead of the usual and faster "out of order" execution). Therefore, the transistor count of the Atom series is much lower and, thus, cheaper to produce. Furthermore, the power consumption is very low. The performance per Megahertz is therfore worse than the old Pentium 3M (1,2 GHz on par with a 1.6 GHz Atom).
Z550: Higher clocked Z520 Atom CPU with a low power consumption.» Further information can be found in our Comparison of Mobile Processsors.