Sonos has been, arguably, the leader when it comes to high quality, multi-room sound. And while a lot of their kit costs a pretty penny, they have always justified their high prices by offering awesome sound quality. But the Sonos One is a new frontier for the Santa Barbara-based company. As well as delivering great sound, it's the company's first foray into the world of smart speakers. I've been road testing the Sonos One for a couple of weeks. Here's what I've learned.