Sony VAIO Pro 13 review It may be the lightest Ultrabooks we've ever seen and have an impressive battery life, but its thin chassis compromises performance.
£1079
Lenovo IdeaPad S405 review It’s very slim for a budget laptop, but it’s far too slow and the touchpad will drive you mad
£348
Acer Aspire P3 review It’s much faster than other £500 Windows 8 tablets, but its temperamental keyboard cradle holds it back from being the very best
£550
Gigabyte U2142 review Poor performance and a grainy display mean that this is an Ultrabook to avoid