If you'd be willing to describe the problems you encountered in issues on https://github.com/letsencrypt/letsencrypt/issues (if they're clearly problems with the client software) or in a forum post at https://community.letsencrypt.org/ (if you're not sure), you can help other people have a better experience in the future.

Not everyone is having five hours' worth of problems -- many people are getting it to work right immediately -- but there are clearly also people who are running into difficulties which it would be great to figure out how to address.