Volkswagen's Golf is the family hatchback against which all others are judged - and in seventh generation form has proved to be the best selling version of this car ever made. Now it's got a smarter look, an all-new 1.5-litre TSI engine option, more sophisticated media connectivity and a range of important detail changes. If you're shopping in this segment, you might be asking yourself why you should buy a Golf. But perhaps the more pertinent question is whether there's now really any reason why you shouldn't.