Love the concept / how the device works so far. I also installed the 'corner mount' device with the doorbell. The camera is a wide-angle, so if you want / need to see activity on the far side of the door, just use the regular mounting plate that comes with the doorbell.Because I got the wired version, I won't need to replace batteries, which is great. You do need to put a jumper wire across two terminals of your existing (inside) doorbell box -- they supply the jumper wire, and the instructions on how to install it are good. This disables your inside box, so if you want to then hear the doorbell ring inside somewhere besides your phone, you'll also need the 'Ring Chime' accessory.(BTW... the reason you need to do the jumper is because there's generally not enough voltage / current to allow the video / audio of the Ring doorbell to operate, along with simultaneously ringing the inside box (doorbells are low-voltage devices)).The instructions advise you to turn off power at the breaker to install, but I didn't bother, and I didn't have any issues. Just don't deliberately cross the two wires together once you've removed the old ringer, and you'll be fine. You don't need to worry about polarity. Just connect the two wires to the two screw terminals on the back of the doorbell, after you attach the mount to the door / frame.A couple of notes on the mounting screws that came with the doorbell unit...The 'B' screws (doorbell to mount) are really too short. Thankfully, an extra set of longer wood screws came with the corner base. They were also flathead, which matters.The screws to mount base to doorframe weren't flatheads, which made the doorbell itself stick out a bit on the mount, until I used the extra flathead ones in their place. If I hadn't also sprung for the corner mount, I'd have had to stop at the hardware store to find replacement screws. Thus, I'm dinging the review to 4 stars. But the device itself -- no complaints, other than all of the screws are so tiny! LOLThankfully, all of the screws (except for the security screw) use the same size screwdriver -- a #2 Phillips. If you have one on a smaller shaft, use it, as the shaft of a 'normal' sized screwdriver can be a bit large for the task. Usually, a #2 Phillips is on a regular sized shaft. A 'PH 0' or 'PH 1' will likely strip the heads, as they're too small. Kind of weird to have such tiny screws use the larger Phillips head slot, but they do. Since they include the security screwdriver (see below), I'd also like to see a smaller PH 2 included, to use with the screws, for ease of installation.The security screw comes with a small screwdriver to install it. But even with the screw installed, one can easily still pry the top of the trim cover out. I'd like longer tabs on the top end of the assembly, so that little miscreants aren't tempted to break off (or even accidentally move) the trim cover from the top.The instructions urge you to scan the QR code which comes on a separate slip of paper in the instructions. But I couldn't scan it properly. That meant I had to manually enter the 5-digit numeric version in software, which meant I had to put a magnifier on the code in order to see the number. I'll chalk that up to my older eyes, but it's still an issue I encountered.If you accidentally pushed the button while wiring it, and put the device in setup mode before you were ready... you'll need to remove the trim cover to re-invoke the setup routine (button perimeter lighting will rotate / change to white). This is where the device links with your phone, then registers with your home network.Once the doorbell is linked, it will check for firmware updates, and install those before you can start setting up the device via the phone app. Be patient; it takes a few minutes.I found the sensitivity of the motion detection needed to be dialed back a bit; otherwise, it would alert to every car driving past the house. There's a utility in the software to further fine-tune the 'active' scanning area, and I wound up using that, along with the 'smart detection' option (or whatever it's called), so that I could keep motion alerts down to people / animals actually coming up the driveway / approaching the house. The 'base' software adjustment for sensitivity is on a 3-position slider, and is pretty much useless (too sensitive, even on the minimum setting). But if you want to see *all* motion out to street level (and farther), this device can certainly do it.The wide-angle lens does distort people's images a tiny bit, when they're close at the door, but I'm willing to accept that, in order to have the wide angle capability.When you install & register the doorbell, it starts out making video captures that are saved for future viewing. This is only for the first 30 days, unless you purchase a monthly plan. I haven't had the device for 30 days yet, but since I can still get still-motion caps and audio stored without a monthly plan, that may be enough for me; we'll see.Night vision is black-and-white, but it's good quality. I'd have no problem identifying someone at the door at night. Daytime is full-color.TL; DR: A little bit of a pain to install / setup -- but once you do, works a treat. Glad I bought it.