Installed the unofficial CM11 for my z1c 24 hours ago. It worked well for the first 12 hours. But the phone periodically freezes after periods of idle.
If I haven't used it for anywhere between 20-60 minutes, it doesn't unlock, stays dark and I have to force a reboot. This has happened 4 times in the past 3 hours.
I'd post this directly into the CM11 thread, but new users can't post in that thread.