Back then, the DVR firmware had a bug (since fixed) that caused a second or two of video to be lost when it recorded IVS events.
I started playing around with BI while waiting for that to get fixed and ended up sticking with it. It has a few geek things I liked (like being able to make a HTTP call when motion on a camera is detected, which makes it really easy to interface with some home automation stuff I’m trying to setup).