Just a little update on my Galaxy S3, as of the CM11-20140606 Nightly, my phone has been running 4.4.3 version of Android, even as my 2012 Nexus 7 has yet to receive it's 4.4.3 update! And I have just installed today's Nightly with no problems so far. It's stable enough to be a "daily driver" and I like the new Contacts screen, looks and works better than before. Apparently the default camera can now save to the SD card but I'm still using a flashed Google Camera so I can't test that. I look forward to the next Nightlies to see what they bring.