After struggling with the different builds of V5, our system is somewhat stable. The ability to properly DR transfer a call to an unregistered extension however, still causes considerable grief. Has anybody installed 4393 and tested this feature yet? Or, are most folks just sitting still on their old versions rather than unleashing the beast of instability again? We do enjoy 3CX, but simply cannot risk the business interruption if 4393 turns out to be unstable.