Few days back Google rolled out Android 4.4.3 KitKat update for Nexus devices to fix the bugs. But i think it not quite worked out because people have reporting about bugs after updating to Android 4.4.3 recently. When Nexus devices received Android 4.4.2 people reported that at the beginning it was working fine but after sometimes devices started rebooting and battery draining etc. Nexus 5 owners reporting about lagging and connectivity issues.
The main reason of releasing Android 4.4.3 was to fix all the bugs that were creating issues like battery drain, camera software, network connectivity , notification, SMS and MMS through hangouts. Seems none of this is fixed as per my point of views because few owners of Nexus 5 and Nexus 4 reported that they are having issues with Wifi after upgrading to Android 4.4.3. One of Nexus 4 owner reported that he was facing device rebooting issue when his device was on Android 4.4.2 and after updating to Android 4.4.3 issues still persist.
Are you having these kind of issue or any others do tell us in comments.