Lenovo's ThinkPad notebooks are prized by business users for their robust build, good security features and solid performance. The new SL series is specifically designed for small businesses and offers, says Lenovo, a cost-effective mix of performance, wireless and multimedia features. One of the star attractions of the SL series — which comprises the 15.4in. SL500, 14.1in. SL400 and 13.3in. SL300 — is built-in mobile broadband. We looked at the SL500, which comes in two configurations: our top-end review sample (NRJ4FUK) costs £700 (ex. VAT), while the lower-spec model (NRJ4DUK) comes in at £550 (ex. VAT).