Ok. I backed this project on Kickstarter because the bold statement by the founding engineers was to beat the perceived state-of-the-art cordless battery operated equivalents. We have used it so far for a week and it outdoes our Dyson v10 both for power, battery duration and dB. So all positive for me. The other plusses are that it feels chunky in a good way (think Vorkwerks) .I was also sold on the promise that parts could be easily changed in the unlikely event of failure. That’s all the pros. Cons? Perhaps not all people will like the said chunkyness, but it does have a very neat modular nature so you will not really be doing any heavy lifting once you remove the rotor head.