I just picked one of these up from a local brick and mortar for $149 (RCA Branded). Configuration was pretty fast after scanning this thread for the tricks, and overall I'm happy with it. Here's what worked for me. Most of these are mentioned throughout the thread, but I figured I'd consolidate them in one post:
This took me about 1 hour total from opening the box, through app setup, and into getting it working in BI.
When installing, I needed a shim on one side (small piece of wood), because the camera is wider than the smooth spot on my door frame. The remaining gap above and below the shim was caulked once all the config and testing was done.
Before you put the cover on, take a picture of the front sticker as you'll need the verification code.
My existing builder grade doorbell transformer seems sufficient. I can't quote the MA rating, however I'm sure it's the cheapest one available going by the theme of the rest of the unaltered builder grade crap here.
Make sure your phone is connected to the 2.4ghz wifi network (5ghz is not supported) you plan to use before using the RCA app to configure wifi. (Setup will go smoother.)
The username is admin and the password is admin + verification code ie. "adminCODE". Make sure you type it correctly. I only got two tries before it ip banned one of my computers for over an hour (even though it said 30 minutes...)
The camera hosted admin web page is bare bones & stripped down hikivision. No static IP settings are available. In fact about the only thing worth while changing here is the OSD settings. I setup my router to assign a static address to this specific device via DHCP.
In BI, first use the find/inspect button, then copy the stream path. Next select Hikivision from the dropdown and then ds-2cdxxxxRSTP from the other dropdown. Then paste what you copied from the stream path when you used find/inspect. While you're in the camera settings, select "decoder compatibility mode" to solve a low framerate issue.
Unsolved, but might be phone related is that my "talk" audio sounds like a robot from the BI iPhone app. Audio is great in the RCA app.
A corner of my brick siding is close to the camera and reflected ir blows out the image at night. I'll probably have to open it up and cut the led at some point.