It argues that it would be better and more democratic to randomly sample parliament instead of voting. It also describes how a transition could look like and how mixed systems could work.
The biggest issue I see is that such a system would need a very strong and well-designed bureaucracy and very well educated and moral public servants. You would have a state run by technocrats, who prepare options for decisions that the randomly drawn parliament would need to make. These technocrats could get all-powerful quickly.