Amazon Echo, Google Home or Sonos One: which smart speaker should I buy?

Voice-control devices that can play music, answer questions and buy goods are one of the hottest gifts this Christmas. Here’s what they can do – and our pick of the best buysSmart speakers are set to be the hottest Christmas gift this year. On Black Friday, Amazon dropped the price of its core Echo product to £79 (it is back up to £90 now), while Google slashed the cost of its Home device from £129 to £77.50 at most outlets (it is also back up now). Meanwhile,