I don’t use the model you have, but I have a number of I8016-LVE units in use for video door intercoms. They more or less “just work”. At one point there was a firmware problem that caused them to hang, and needed to be manually rebooted, but that was a good while ago; I’ve had no firmware problems (that I know of) for at least the last year.
One of my clients uses them on “employee doors” so that temp workers and contractors can be let into the building by a shift supervisor, using a cell phone. We use Clearly Anywhere soft phone on that cell phone; they’re able to answer the door and unlock it with very little delay. Ultimately we’re quite happy with this solution.
Are you still having any problems with your setup?