Firstly, for no reason, my phone stopped ringing and only vibrated when receiving a call even though I had set the ring tone and notification tones up and had been working up until that point. When I checked the sound settings both 'Phone ringtone' and 'Default notification' had reverted back to 'Default' which meant no sound. I have now set them both back to their previous settings and it is working fine again. I will keep an eye on this to see if it changes the settings again.
Secondly, if the screen is off and a call comes in the screen does not wake up to show who is calling. The phone rings but the screen is still off. I have to press the home button to wake the display up to show who is calling and answer the call. As I said before this problem started after a few days and is now permanent even after a reboot.
Other than these two issues everything else appears fine.
I had the same issues with this rom after a couple of days of use, so I flashed another rom (lightning) and I am using it for 2 days now, without any problem.