Before downloading and installing, you need to understand that these are not "stable" builds, meaning it is likely that things may not work as expected. On the contrary, you may find it to run better than anything you have ever used. For those wanting to test and report issues, I ask the following:
1) Be very familiar with the rooting, custom recoveries, flashing roms, etc
2) Wipe data and cache (more than once) before installing the beta build
3) Not restore data (start fresh, download each app individually)
4) Use only the default kernel provided in the beta build
5) Not modify the beta build in any way (removing apps, themeing, etc)
6) Run only the latest baseband available (C_01.43.01P)
7) Run only the latest nightly build available
8) Fully read release notes/
changelog before flashing beta build