Bitcoin World(https://bitcoinworld.me) is now using Lets Encrypt. The setup was very easy and this is awesome. With a little more tweaks, also got A+ on Qualsys SSL test ( https://www.ssllabs.com/ssltest/analyze.html?d=bitcoinworld.me ) and with support for most possible clients.
Complete IPv6 support (Digital Ocean).
The latest client was able to configure server automatically, but I had to manually force https in virtual host. Shutdown the Apache Server and ran letsencrypt auto and it worked flawless.
Just awesome. Now looking for a badge or something to add to the website, and lets jump forward towards encrypted web.