CyanogenMod fans should rejoice – Android 4.4 Kitkat based CyanogenMod 11.0 M1 build is now available for you to tryout. This is not the stable release but M1 snapshot and is only available for Nexus devices currently. The last release from CyanogenMod team was version 10.2 stable build which was still on Android 4.3.
The M snapshots are more stable than nightlies but still fall under experimental release and are generally made available at the beginning of each month. If you do not want to take any risk you should better wait for the stable builds. The CyanogenMod team works on nightlies throughout the month and release the M builds which are safer than nightlies for the fans to try out and provide feedback. In the case of CyanogenMod 11, the team decided against waiting for a whole month to to release the M snapshot and give its users a taste of CyanogenMod Android Kitkat. Since Nexus devices readily support Android Open Source Project, they should have minimal issues with the new build. The team has the build tested on the devices to make sure they work properly. However, users can report any bugs that crop up.
Non-Nexus users should not feel left out as the CM team is working to make CM 11 nightly builds available to other devices as well. Gradually more and more devices will be added to the m1/M2 list and finally the 11.0 stable release.
You can grab the snapshot for Nexus 7 (2012 and 2013), Nexus 4, Nexus 5 and Nexus 5 from here.