After reading through the website and watching their video, I still don't understand how it works out what it's value proposition is. Is there some demo where I can see and understand how Cypress provides value over the state of the art?
The one time Selenium was reliable in my company was when our team had a dedicated, massively overprovisioned grid.
The biggest pro is it just has less random "Oh, guess that timed out?" issues than when we used Selenium.
The biggest negative is it's chrome only.
In practice, I have had much less flakiness in my Cypress tests than with selenium or other webdriver API.