In terms of the controller aspect I honestly haven’t noticed a difference (as expected).
From an NVR standpoint I like it, although there’s room for improvement. I only have on (Flex) camera so far, but the cameras are so cheap I can justify using them throughout the house instead of motion detectors which is awesome. I actually plan on eventually having two of the NVRs - one for outside with the “hybrid” cloud access turned on, and one for inside that’s more locked down.
I love that it’s always recording audio and video, while not using any bandwidth. All functions work really well on both desktop and mobile (timeline, settings, defining motion zones, etc.) However I do wish it had object recognition to help filter false positive alerts. I have the camera at the back of a ~12" soffit but at night because of the reflection from the IR emitters it still goes off from snow, rain, fog, etc. I tried adjusting sensitivity down to 1% and it was still going off. Also, there’s no rate-limiting for the notifications so when something like snow sets it off it sends notifications every ~10 seconds for hours…
In the relatively short time I’ve had UniFi equipment a lot of features have been added and functionality enhanced, so I’m optimistic that the same will be true with UniFi Protect. There’s already been 3 updates in the month or so I’ve had the NVR.
Feel free to DM me if you have any more questions, so we don’t clutter up this thread!