With the ProBook 455 G3, HP is hoping to lure business users looking for a relatively affordable laptop with a premium feel. In terms of design, it's an upgrade on HP's 255 G3 model and even moreso on the value-focused 250 G4. The 455 G3 feels more grown-up, and expensive, than both - but not necessarily more capable; surprisingly.At £504 (around US$666...