The old site asked you to take a fair amount on faith. It said Keeper.sh synced calendars, and left the questions people actually have — which calendars, how quickly, what it costs, what happens to the contents of your events — to be discovered after signing up.
The rebuilt site answers those up front. There are pages for what it does and what it costs, the providers it works with are named rather than implied, and the privacy behaviour is stated plainly: what a copy carries by default, what a shared link shows, and what is never copied on any plan.
It is also honest about the shape of the product rather than only its best angle. The free plan's limits are written down next to the paid one's, and running Keeper.sh yourself is documented rather than buried, on the grounds that people who want to read the code before trusting it with their calendar should not have to go looking.
Read more about everything Keeper.sh does.