Dyson 360 Eye vacuum review: the robot that sucks (but in a good way)

British cleaner maker's first robot vacuum was worth waiting for, but costs a lot, can't do the stairs and isn't perfect despite being the best available right now

Dyson's 360 Eye robot vacuum cleaner has finally been released in the UK after an extensive trial in Japan and it claims to be the best available. How does it stack up against the market leading Roomba - and is it really worth buying?