I was really intrigued by the idea of being able to turn lights on and off remotely via remote (or an app when paired with the Liftmaster 828LM Internet Gateway). We purchased two of these for our garage lights and our front lights. I can imagine getting even more in the future.
When paired with the Liftmaster 888LM wall control and the Liftmaster 828LM Internet Gateway, I now have some cool capabilities, all without having to switch out our existing LM garage door opener (circa 2009). By the way, if you already have a newer Liftmaster/Chamberlain Garage Door Opener with myQ 2.0 support, then the 888LM isn't necessary. If you just want to control the lights with a remote (from the house or the car) then the 828LM is also unnecessary. But with that added internet gateway and an app, I can use an iOS or Android device and monitor the state of the lights, turn them on and off, receive alerts when the lights are switched on/off, etc.
The hardest thing about installing the 823LM light switches was turning off the power to the right circuit; but that's just because our electrical panel isn't labeled too well. After that, it was an easy job to remove the plate, remove the old switch, wire the existing wires back to the new switch, feed the antenna wire down below the box, test and then reinstall the switch plate.
A few caveats, it may be hard to know which wire is the hot wire and which is the load wire in your box. I got it backwards the first time, but it just took switching the wires after it didn't work the first time. Also be sure your switch box has a ground wire, since that is required. Most modern switch boxes will, but if yours doesn't for some reason, you will need to get an electrician to help. Finally, it does actually take a few minutes for something in the switch to charge up before it works, so be aware of that. Let it sit for a few minutes after installing before testing.
Once the switch is ready to go, it should switch on by pressing the top of the rectangular panel and off at the bottom of that panel (but not the complete bottom; that's covering the learn button and an LED). There is a little bit of resistance and a small "click" sound, but nothing you'll notice after repeated usage.
Also be aware that you are just buying the switch that goes behind the plate. For us this wasn't a problem since we already had the larger rectangular cutouts from the larger rocker switches. But if you have the older style up/down switches, you will have to replace the switch plate. The picture shows the installed result, but the switch doesn't come with the switch plate, just the switch that goes behind and into the box. Also, make sure you have room in your box and can push wires out of the way. The unit will fill up much of the box so if you have a really tight wiring situation, you may have problems adding this switch.
Having added the lights and programmed them to both cars, now we can drive up and turn on the light on the porch or all the lights in the garage. And at night, I can check the app and if we have forgotten to turn off the porch light or the garage lights, I can check the status and turn them off without getting out of bed. Likewise, if I hear a noise outside, I can turn on the outside lights, check the security monitor to our outside cameras and see if anything is there.
With just these few upgrades, it feels like I have a really cool smart home. My only wish would be for a few more features in the app such as the ability to schedule lights to turn on and off, for a way to check the status of the lights without having to open the app, or an ability to lock the garage door opener for a period of time so it won't open even with commands from remotes (say when we are going out of town for a while). Even still, I'm very happy with our purchases of the 888LM/828LM/823LM.
The last thing I will mention is that I didn't buy our switches from Amazon. We actually bought them from Home Depot. The switches they sell are about the same price, but come with the little key-fob remotes (3-buttons) that you can program. Even if you don't need these, I think it makes sense in case you needed to return the switches for some reason, you could do it easily to a Home Depot store. Also, if you see the model number for the Chamberlain light switches, don't worry. We actually bought the WSLCEV version which is identical to the 823LM. It's just the consumer packaging of the switch.