It worked fine for me except not working outgoing sms and ussd requests, which was not very critical for me.
Last weekend it was upgraded to Cyanogen 11 (android 4.4.2) and after the upgrade I cannot receive calls, the caller can hear long bips but nothing happens on my side.
However now I can send sms and ussd request. The problem of not receiving calls is really critiacal
I have unloked GSM and using the phone in Ukraine, baseband version is L720VPUAMDC