A 'premium carbon fibre notebook for professionals', the <a href="http://vaio.sony.co.uk/view/ShowProduct.action?product=VGN-SZ4XWN%2FC&site=voe_en_GB_cons&category=VN+SZ+Series">VAIO VGN-SZ4XWN/C</a> has everything you’d expect from Sony in terms of sleek design and careful attention to detail. The presence of a built-in camera, fingerprint recognition and HSDPA support mark it out as a serious notebook for business use. However, it's very expensive, and we are concerned about one aspect of the build quality.